GB1164417A - Sulphurized Calcium Alkylphenolate Lubricant Compositions - Google Patents
Sulphurized Calcium Alkylphenolate Lubricant CompositionsInfo
- Publication number
- GB1164417A GB1164417A GB01176/68A GB1117668A GB1164417A GB 1164417 A GB1164417 A GB 1164417A GB 01176/68 A GB01176/68 A GB 01176/68A GB 1117668 A GB1117668 A GB 1117668A GB 1164417 A GB1164417 A GB 1164417A
- Authority
- GB
- United Kingdom
- Prior art keywords
- calcium
- alkyl
- per cent
- oil
- sulphurized
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M159/00—Lubricating compositions characterised by the additive being of unknown or incompletely defined constitution
- C10M159/12—Reaction products
- C10M159/20—Reaction mixtures having an excess of neutralising base, e.g. so-called overbasic or highly basic products
- C10M159/22—Reaction mixtures having an excess of neutralising base, e.g. so-called overbasic or highly basic products containing phenol radicals
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/024—Propene
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/026—Butene
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
- C10M2209/084—Acrylate; Methacrylate
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
- C10M2219/044—Sulfonic acids, Derivatives thereof, e.g. neutral salts
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
- C10M2219/046—Overbasedsulfonic acid salts
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/08—Thiols; Sulfides; Polysulfides; Mercaptals
- C10M2219/082—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
- C10M2219/087—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Derivatives thereof, e.g. sulfurised phenols
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/08—Thiols; Sulfides; Polysulfides; Mercaptals
- C10M2219/082—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
- C10M2219/087—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Derivatives thereof, e.g. sulfurised phenols
- C10M2219/088—Neutral salts
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/08—Thiols; Sulfides; Polysulfides; Mercaptals
- C10M2219/082—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
- C10M2219/087—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Derivatives thereof, e.g. sulfurised phenols
- C10M2219/089—Overbased salts
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2221/00—Organic macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2221/02—Macromolecular compounds obtained by reactions of monomers involving only carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
- C10M2223/045—Metal containing thio derivatives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
- C10M2223/04—Phosphate esters
- C10M2223/047—Thioderivatives not containing metallic elements
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2225/00—Organic macromolecular compounds containing phosphorus as ingredients in lubricant compositions
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2225/00—Organic macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2225/02—Macromolecular compounds from phosphorus-containg monomers, obtained by reactions involving only carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2225/00—Organic macromolecular compounds containing phosphorus as ingredients in lubricant compositions
- C10M2225/04—Organic macromolecular compounds containing phosphorus as ingredients in lubricant compositions obtained by phosphorisation of macromolecualr compounds not containing phosphorus in the monomers
- C10M2225/041—Hydrocarbon polymers
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
- C10M2229/04—Siloxanes with specific structure
- C10M2229/041—Siloxanes with specific structure containing aliphatic substituents
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2010/00—Metal present as such or in compounds
- C10N2010/04—Groups 2 or 12
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
- C10N2020/01—Physico-chemical properties
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2070/00—Specific manufacturing methods for lubricant compositions
- C10N2070/02—Concentrating of additives
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Abstract
1,164,417. Lubricants. TEXACO DEVELOPMENT CORP. 7 March, 1968 [20 March, 1967], No. 11176/68. Heading C5F. A lubricant comprises a hydrocarbon oil and 0À1-90 wt. per cent of a sulphurized normal calcium alkyl phenolate having a calcium metal ratio of 1, a calcium content of 1-8 wt. per cent, and a sulphur content of 0À5-12 wt. per cent wherein said phenolate is produced by contacting in said oil (1) a C 4 -C 100 alkyl-phenol, (2) sulphur and (3) calcium alkoxyalkoxide of formula Ca(OAOR<SP>1</SP>) 2 , where A is C 1 -C 6 alkylene and R<SP>1</SP> is C 1 -C 25 alkyl, at 0-250‹ C. with a mole ratio of (1): (2) of 1:0À15 to 1: 8 and a mole ratio of (1): (3) of 1À8: 1 to 2À2: 1. The oil may be mineral or a polyalkylene, e.g. polypropylene and polyisobutylene. The composition may also contain an ethoxylated derivative of polyisobutene thiophosphonic acid.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US62419367A | 1967-03-20 | 1967-03-20 | |
US64036267A | 1967-05-22 | 1967-05-22 | |
US85575869A | 1969-09-05 | 1969-09-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1164417A true GB1164417A (en) | 1969-09-17 |
Family
ID=27417349
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB01176/68A Expired GB1164417A (en) | 1967-03-20 | 1968-03-07 | Sulphurized Calcium Alkylphenolate Lubricant Compositions |
GB01175/68A Expired GB1168411A (en) | 1967-03-20 | 1968-03-07 | Lubricating Oil Compositions |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB01175/68A Expired GB1168411A (en) | 1967-03-20 | 1968-03-07 | Lubricating Oil Compositions |
Country Status (4)
Country | Link |
---|---|
US (3) | US3474035A (en) |
BE (2) | BE712521A (en) |
DE (2) | DE1769011A1 (en) |
GB (2) | GB1164417A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2620539A1 (en) * | 1975-12-24 | 1977-07-07 | Liquichimica Robassomero Spa | PROCESS FOR THE MANUFACTURING OF LUBRICATING OIL |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3474035A (en) * | 1967-03-20 | 1969-10-21 | Texaco Inc | Lubricating oil containing overbased sulfurized calcium alkylphenolate |
US3741896A (en) * | 1970-12-11 | 1973-06-26 | Chevron Res | Basic alkylene amine and sulfur bridged alkylphenoxides for use in lubricating oils |
US3793201A (en) * | 1970-12-28 | 1974-02-19 | Lubrizol Corp | Stabilized basic magnesium sulfonate compositions |
US3755170A (en) * | 1971-05-17 | 1973-08-28 | Continental Oil Co | Preparation of highly basic alkylphenates and sulfurized alkyphenates |
US3897352A (en) * | 1973-12-21 | 1975-07-29 | Texaco Inc | Sulfurized nitrated alkylphenol salts and lubricant compositions thereof |
US3969235A (en) * | 1974-08-26 | 1976-07-13 | Texaco Inc. | Sulfurized calcium alkylphenolate compositions |
US4171270A (en) * | 1976-12-27 | 1979-10-16 | Texaco Inc. | Sulfurized overbased calcium alkylphenolate lubricant composition |
US4169799A (en) * | 1976-12-27 | 1979-10-02 | Texaco Inc. | Lubricating oil composition |
US4171269A (en) * | 1976-12-27 | 1979-10-16 | Texaco Inc. | Sulfurized lubricant composition |
US4320016A (en) * | 1979-09-24 | 1982-03-16 | Texaco Inc. | Carbon dioxide-blown overbased calcium alkylphenolate lubricating compositions |
US4282107A (en) * | 1979-09-26 | 1981-08-04 | Texaco Inc. | Diesel crankcase lubricant composition |
US4608184A (en) * | 1985-07-12 | 1986-08-26 | Amoco Corporation | Phenate process and composition improvement |
US5256319A (en) * | 1989-03-30 | 1993-10-26 | Institut Francais Du Petrole | New thiophosphoretted compounds, their preparation and their use as additives for lubricants |
FR2645168B1 (en) * | 1989-03-30 | 1993-02-05 | Inst Francais Du Petrole | NOVEL THIOPHOSPHORUS COMPOUNDS, THEIR PREPARATION AND THEIR USE AS LUBRICANT ADDITIVES |
US4973411A (en) * | 1989-09-15 | 1990-11-27 | Texaco Inc. | Process for the preparation of sulfurized overbased phenate detergents |
US8198225B2 (en) * | 2007-11-29 | 2012-06-12 | Chevron Oronite Company Llc | Sulfurized metal alkyl phenate compositions having a low alkyl phenol content |
CA2944879A1 (en) * | 2014-04-04 | 2015-10-08 | The Lubrizol Corporation | Method for preparing a sulfurized alkaline earth metal dodecylphenate |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2289795A (en) * | 1938-10-14 | 1942-07-14 | Standard Oil Dev Co | Lubricant |
US2680096A (en) * | 1951-02-12 | 1954-06-01 | California Research Corp | Process for preparing sulfurized polyvalent metal phenates |
US2870134A (en) * | 1956-12-12 | 1959-01-20 | Texas Co | Preparation of calcium phenolates and sulfurized derivatives thereof |
US2916454A (en) * | 1957-02-18 | 1959-12-08 | Socony Mobil Oil Co Inc | Preparation of complex carbonated metal salts of alkyl phenol sulfides and mineral oil fractions containing the same |
US3150088A (en) * | 1962-03-23 | 1964-09-22 | Continental Oil Co | Highly basic calcium-containing additive agent |
NL251400A (en) * | 1959-05-11 | |||
US3425941A (en) * | 1966-09-26 | 1969-02-04 | Texaco Inc | Method of preparing calcium alkylphenolates |
US3474035A (en) * | 1967-03-20 | 1969-10-21 | Texaco Inc | Lubricating oil containing overbased sulfurized calcium alkylphenolate |
-
1967
- 1967-03-20 US US624193A patent/US3474035A/en not_active Expired - Lifetime
- 1967-05-22 US US640362A patent/US3528917A/en not_active Expired - Lifetime
-
1968
- 1968-03-07 GB GB01176/68A patent/GB1164417A/en not_active Expired
- 1968-03-07 GB GB01175/68A patent/GB1168411A/en not_active Expired
- 1968-03-20 BE BE712521D patent/BE712521A/xx unknown
- 1968-03-20 DE DE19681769011 patent/DE1769011A1/en active Pending
- 1968-03-20 DE DE1769012A patent/DE1769012C3/en not_active Expired
- 1968-03-20 BE BE712522D patent/BE712522A/xx unknown
-
1969
- 1969-09-05 US US855758A patent/US3549534A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2620539A1 (en) * | 1975-12-24 | 1977-07-07 | Liquichimica Robassomero Spa | PROCESS FOR THE MANUFACTURING OF LUBRICATING OIL |
Also Published As
Publication number | Publication date |
---|---|
DE1769011A1 (en) | 1971-06-09 |
US3528917A (en) | 1970-09-15 |
DE1769012C3 (en) | 1975-06-12 |
DE1769012B2 (en) | 1974-10-24 |
US3549534A (en) | 1970-12-22 |
US3474035A (en) | 1969-10-21 |
BE712521A (en) | 1968-09-20 |
GB1168411A (en) | 1969-10-22 |
DE1769012A1 (en) | 1972-05-04 |
BE712522A (en) | 1968-09-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |