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DE3932807C1 - - Google Patents

Info

Publication number
DE3932807C1
DE3932807C1 DE3932807A DE3932807A DE3932807C1 DE 3932807 C1 DE3932807 C1 DE 3932807C1 DE 3932807 A DE3932807 A DE 3932807A DE 3932807 A DE3932807 A DE 3932807A DE 3932807 C1 DE3932807 C1 DE 3932807C1
Authority
DE
Germany
Prior art keywords
sleeve body
sleeve
thermoplastic material
welding
reinforcement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE3932807A
Other languages
German (de)
English (en)
Inventor
Thomas Dr.-Ing. Stetten Ch Strauch
Alfred Uhwiesen Ch Thalmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Georg Fischer AG
Original Assignee
Georg Fischer AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Georg Fischer AG filed Critical Georg Fischer AG
Priority to DE3932807A priority Critical patent/DE3932807C1/de
Priority to YU172090A priority patent/YU172090A/sh
Priority to PCT/CH1990/000218 priority patent/WO1991004845A1/fr
Priority to HU8976A priority patent/HUT58600A/hu
Priority to CA002042367A priority patent/CA2042367A1/fr
Priority to EP90912857A priority patent/EP0446314A1/fr
Priority to AU62794/90A priority patent/AU6279490A/en
Priority to BR909006940A priority patent/BR9006940A/pt
Priority to JP2511969A priority patent/JPH04501986A/ja
Priority to GR900100705A priority patent/GR900100705A/el
Priority to PL28710190A priority patent/PL287101A1/xx
Priority to CS904733A priority patent/CS473390A3/cs
Priority to PT95460A priority patent/PT95460A/pt
Application granted granted Critical
Publication of DE3932807C1 publication Critical patent/DE3932807C1/de
Priority to FI912498A priority patent/FI912498A0/fi
Priority to NO91912066A priority patent/NO912066L/no
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/001—Pipes; Pipe joints
    • B29D23/003—Pipe joints, e.g. straight joints
    • B29D23/005—Pipe joints, e.g. straight joints provided with electrical wiring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
    • B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B29C66/52295—Joining tubular articles involving the use of a socket said socket comprising reinforcements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/02—Welded joints; Adhesive joints
    • F16L47/03—Welded joints with an electrical resistance incorporated in the joint
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3468—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the means for supplying heat to said heated elements which remain in the join, e.g. special electrical connectors of windings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B29C66/7212—Fibre-reinforced materials characterised by the composition of the fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Laminated Bodies (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Ropes Or Cables (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
DE3932807A 1989-09-30 1989-09-30 Expired - Lifetime DE3932807C1 (fr)

Priority Applications (15)

Application Number Priority Date Filing Date Title
DE3932807A DE3932807C1 (fr) 1989-09-30 1989-09-30
YU172090A YU172090A (sh) 1989-09-30 1990-09-11 Naglavak za zavarivanje i postupak za njegovu izradu
JP2511969A JPH04501986A (ja) 1989-09-30 1990-09-13 溶接スリーブおよびその製造方法
HU8976A HUT58600A (en) 1989-09-30 1990-09-13 Welding shell and method for producing same
CA002042367A CA2042367A1 (fr) 1989-09-30 1990-09-13 Manchon de soudage et procede de fabrication dudit manchon
EP90912857A EP0446314A1 (fr) 1989-09-30 1990-09-13 Manchon a souder et procede pour sa fabrication
AU62794/90A AU6279490A (en) 1989-09-30 1990-09-13 Welding muff and process for manufacturing it
BR909006940A BR9006940A (pt) 1989-09-30 1990-09-13 Luva de soldagem e processo para sua fabricacao
PCT/CH1990/000218 WO1991004845A1 (fr) 1989-09-30 1990-09-13 Manchon a souder et procede pour sa fabrication
GR900100705A GR900100705A (el) 1989-09-30 1990-09-18 Κολλαρο συγκολλησεωσς και μεθοδος κατασκευης της.
PL28710190A PL287101A1 (en) 1989-09-30 1990-09-28 Method of making a weldable pipe socket and weldable pipe socket made thereby
CS904733A CS473390A3 (en) 1989-09-30 1990-09-28 Welded socket and process for producing thereof
PT95460A PT95460A (pt) 1989-09-30 1990-09-28 Manga de soldadura e seu processo de fabrico
FI912498A FI912498A0 (fi) 1989-09-30 1991-05-23 Svetsbar muff och foerfarande foer dess framstaellning.
NO91912066A NO912066L (no) 1989-09-30 1991-05-29 Sveisemuffe og fremgangsmaate for dens fremstilling.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3932807A DE3932807C1 (fr) 1989-09-30 1989-09-30

Publications (1)

Publication Number Publication Date
DE3932807C1 true DE3932807C1 (fr) 1991-05-02

Family

ID=6390640

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3932807A Expired - Lifetime DE3932807C1 (fr) 1989-09-30 1989-09-30

Country Status (15)

Country Link
EP (1) EP0446314A1 (fr)
JP (1) JPH04501986A (fr)
AU (1) AU6279490A (fr)
BR (1) BR9006940A (fr)
CA (1) CA2042367A1 (fr)
CS (1) CS473390A3 (fr)
DE (1) DE3932807C1 (fr)
FI (1) FI912498A0 (fr)
GR (1) GR900100705A (fr)
HU (1) HUT58600A (fr)
NO (1) NO912066L (fr)
PL (1) PL287101A1 (fr)
PT (1) PT95460A (fr)
WO (1) WO1991004845A1 (fr)
YU (1) YU172090A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4203626A1 (de) * 1992-02-08 1993-08-12 Fischer Georg Rohrleitung Schweissmuffe und verfahren zu deren herstellung
EP0635354A1 (fr) * 1993-07-23 1995-01-25 Streng Plastic AG Manchon électro-soudable
EP0939269A1 (fr) * 1998-02-25 1999-09-01 Bernd Merle Bobine de chauffage avec manchon retractable et méthode pour sa fabrication
WO2001006168A1 (fr) * 1999-07-16 2001-01-25 Atofina Research Manchon a soudure electrique renforces pour tuyaux en plastique
WO2005105407A1 (fr) * 2004-04-28 2005-11-10 Henry Technologies Gmbh Procedes de fabrication d'un raccord de tubulures haute pression
EA028737B1 (ru) * 2015-10-19 2017-12-29 Закрытое акционерное общество "СМИТ-ГРУПП" Стыковое соединение изолированных труб или фасонных изделий

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4307704A1 (de) * 1993-03-11 1994-09-15 Wilhelm Hegler Verfahren zum Verschweißen von aus thermoplastischem Kunststoff bestehenden Rohrstücken
AU727163B2 (en) * 1996-06-25 2000-12-07 Uponor Innovation Ab Electrofusion fitting
NL1009169C2 (nl) 1998-05-14 1999-11-16 Polva Pipelife Bv Lasmofverbinding voor hogedrukleiding.
CA2854951C (fr) * 2011-11-16 2020-05-12 Flexpipe Systems Inc. Raccordement pour canalisation thermoplastique, ensemble et procede
CA2864762C (fr) 2012-02-17 2019-06-04 8193053 Canada Ltd. Tuyau, raccord de tuyau et systeme de canalisation
CN111219559A (zh) * 2019-10-29 2020-06-02 浙江庆发管业科技有限公司 高压油气管道用pe复合电熔管件及其制造方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB829179A (en) * 1957-01-09 1960-02-24 Union Carbide Corp Plastic conduit joint
EP0222287A1 (fr) * 1985-11-13 1987-05-20 Friatec Aktiengesellschaft Keramik- und Kunststoffwerke Raccord ou manchon soudable électriquement

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB698488A (en) * 1950-06-09 1953-10-14 Trist & Co Ltd Ronald Improvements relating to oil seals and like packing members
GB1121850A (en) * 1964-11-14 1968-07-31 Furukawa Electric Co Ltd A jointing method of pipe shaped plastics and the jointing materials
NL6601024A (fr) * 1966-01-27 1967-07-28
CH671444A5 (fr) * 1986-06-25 1989-08-31 Fischer Ag Georg
FR2606487B1 (fr) * 1986-11-07 1989-03-10 Silix Tubes a base de resine polyolefinique pour la realisation de canalisations, manchons pour leur assemblage et procede pour leur fabrication
GB8805911D0 (en) * 1988-03-12 1988-04-13 Victaulic Plc Process for jointing of polyolefin bodies
US5150922A (en) * 1989-01-11 1992-09-29 Osaka Gas Co., Ltd. Electrofusion joint and hot water supply header using the same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB829179A (en) * 1957-01-09 1960-02-24 Union Carbide Corp Plastic conduit joint
EP0222287A1 (fr) * 1985-11-13 1987-05-20 Friatec Aktiengesellschaft Keramik- und Kunststoffwerke Raccord ou manchon soudable électriquement

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4203626A1 (de) * 1992-02-08 1993-08-12 Fischer Georg Rohrleitung Schweissmuffe und verfahren zu deren herstellung
EP0635354A1 (fr) * 1993-07-23 1995-01-25 Streng Plastic AG Manchon électro-soudable
EP0939269A1 (fr) * 1998-02-25 1999-09-01 Bernd Merle Bobine de chauffage avec manchon retractable et méthode pour sa fabrication
US6215107B1 (en) 1998-02-25 2001-04-10 Herrn Dipl.-Ing. Bernd Merle Heating coil fitting with shrunk-on cover and process for same
WO2001006168A1 (fr) * 1999-07-16 2001-01-25 Atofina Research Manchon a soudure electrique renforces pour tuyaux en plastique
WO2005105407A1 (fr) * 2004-04-28 2005-11-10 Henry Technologies Gmbh Procedes de fabrication d'un raccord de tubulures haute pression
EA028737B1 (ru) * 2015-10-19 2017-12-29 Закрытое акционерное общество "СМИТ-ГРУПП" Стыковое соединение изолированных труб или фасонных изделий

Also Published As

Publication number Publication date
PL287101A1 (en) 1991-06-03
BR9006940A (pt) 1991-10-08
HU907689D0 (en) 1991-08-28
CS473390A3 (en) 1992-01-15
JPH04501986A (ja) 1992-04-09
CA2042367A1 (fr) 1991-03-31
YU172090A (sh) 1992-09-07
FI912498A0 (fi) 1991-05-23
AU6279490A (en) 1991-04-28
WO1991004845A1 (fr) 1991-04-18
NO912066D0 (no) 1991-05-29
HUT58600A (en) 1992-03-30
NO912066L (no) 1991-05-29
PT95460A (pt) 1992-06-30
GR900100705A (el) 1992-01-20
EP0446314A1 (fr) 1991-09-18

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Legal Events

Date Code Title Description
8100 Publication of patent without earlier publication of application
D1 Grant (no unexamined application published) patent law 81
8364 No opposition during term of opposition