DE69004109D1 - Microwave absorber material containing acicular magnetic metal fibers. - Google Patents

Microwave absorber material containing acicular magnetic metal fibers.

Info

Publication number: DE69004109D1
Authority: DE; Germany
Prior art keywords: material containing; magnetic metal; metal fibers; absorber material; microwave absorber
Prior art date: 1989-01-26
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 - Fee Related

Application number

DE90300632T

Other languages

German (de)

Other versions

DE69004109T2 (en

Inventor

Charles E Boyer

Eric J Borchers

Richard J Kuo

Charles D Hoyle

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.)

3M Co

Original Assignee

Minnesota Mining and Manufacturing Co

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.)

1989-01-26

Filing date

1990-01-22

Publication date

1993-12-02

1990-01-22 Application filed by Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co

1993-12-02 Application granted granted Critical

1993-12-02 Publication of DE69004109D1 publication Critical patent/DE69004109D1/en

1994-05-11 Publication of DE69004109T2 publication Critical patent/DE69004109T2/en

2010-01-23 Anticipated expiration legal-status Critical

Status Expired - Fee Related legal-status Critical Current

Classifications

- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
- H01Q17/005—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems using woven or wound filaments; impregnated nets or clothes

DE1990604109 1989-01-26 1990-01-22 Microwave absorber material containing acicular magnetic metal fibers. Expired - Fee Related DE69004109T2 (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US30242789A	1989-01-26	1989-01-26

Publications (2)

Publication Number	Publication Date
DE69004109D1 true DE69004109D1 (en)	1993-12-02
DE69004109T2 DE69004109T2 (en)	1994-05-11

Family

ID=23167694

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
DE1990604109 Expired - Fee Related DE69004109T2 (en)	1989-01-26	1990-01-22	Microwave absorber material containing acicular magnetic metal fibers.

Country Status (5)

Country	Link
EP (1)	EP0380267B1 (en)
JP (1)	JPH02235396A (en)
AU (1)	AU615817B2 (en)
CA (1)	CA2005198A1 (en)
DE (1)	DE69004109T2 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5275880A (en) *	1989-05-17	1994-01-04	Minnesota Mining And Manufacturing Company	Microwave absorber for direct surface application
IT1230281B (en) *	1989-06-15	1991-10-18	Sits Soc It Telecom Siemens	PROCEDURE FOR THE CONSTRUCTION OF ABSORBERS FOR ELECTROMAGNETIC FIELDS.
US4972058A (en) *	1989-12-07	1990-11-20	E. I. Du Pont De Nemours And Company	Surface heating food wrap with variable microwave transmission
JPH0935927A (en) *	1995-07-20	1997-02-07	Tokin Corp	Composite magnetic body and electromagnetic interference suppressor using the same
DE19756620A1 (en)	1997-12-19	1999-06-24	Bosch Gmbh Robert	Preparation of absorber material
ES2274674B1 (en) *	2004-12-24	2008-04-16	Micromag 2000, S.L.	ELECTROMAGNETIC RADIATION ABSORBER BASED ON MAGNETIC MICROWAVES.
DE102007011590B4 (en) *	2007-03-08	2008-12-04	Genesis Adaptive Systeme Deutschland Gmbh	Material composite for the EMC shielding
CN105670370B (en) *	2016-01-04	2017-11-03	北京环境特性研究所	A kind of wool top molded breadth frequency stealth material
CN110854545B (en) *	2019-10-29	2021-03-16	南京邮电大学	Frequency band transfer wave absorber based on mercury expansion with heat and contraction with cold regulation

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4538151A (en) *	1982-03-31	1985-08-27	Nippon Electric Co., Ltd.	Electro-magnetic wave absorbing material
US4507224A (en) *	1982-12-03	1985-03-26	Agency Of Industrial Science & Technology	Ceramics containing fibers of silicon carbide
WO1985002265A1 (en) *	1983-11-07	1985-05-23	The Dow Chemical Company	Low density, electromagnetic radiation absorption composition
US4606848A (en) *	1984-08-14	1986-08-19	The United States Of America As Represented By The Secretary Of The Army	Radar attenuating paint
EP0278458A3 (en) *	1987-02-10	1989-12-06	Buchtal Gesellschaft mit beschränkter Haftung	Electrically conducting non-glazed ceramic element in the form of a slab

1989
- 1989-12-12 CA CA 2005198 patent/CA2005198A1/en not_active Abandoned
- 1989-12-21 AU AU47088/89A patent/AU615817B2/en not_active Ceased
1990
- 1990-01-22 DE DE1990604109 patent/DE69004109T2/en not_active Expired - Fee Related
- 1990-01-22 EP EP19900300632 patent/EP0380267B1/en not_active Expired - Lifetime
- 1990-01-25 JP JP2015928A patent/JPH02235396A/en active Pending

Also Published As

Publication number	Publication date
AU4708889A (en)	1990-08-02
JPH02235396A (en)	1990-09-18
EP0380267B1 (en)	1993-10-27
DE69004109T2 (en)	1994-05-11
AU615817B2 (en)	1991-10-10
CA2005198A1 (en)	1990-07-26
EP0380267A1 (en)	1990-08-01

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Legal Events

Date	Code	Title	Description
1994-11-24	8364	No opposition during term of opposition
2007-11-15	8339	Ceased/non-payment of the annual fee