US4977295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gasket impervious to electromagnetic energy
Assignee: Raytheon Co
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Filing: 1989-07-28
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Granted: 1990-12-11
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Expires: 2009-07-28
Abstract
Abstract A gasket, and method of making same, is shown to consist of a substantially solid core of silicone rubber supporting an electrically conductive coating primarily made from a polythioether impregnated with particles of nickel, the coating also containing an oxidizing inhibitor.
Inventors
- 👤 Tim Chin
- 👤 Susan D. Kohlman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:27
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/10; F16J15/12; F16J15/121; F16J15/126; B; B29; B29C; B29C48/00; B29C48/03; B29C48/06; B29C48/15; B29C70/00; B29C70/88; B29C70/882; H; H05; H05K; H05K9/00; H05K9/0007; H05K9/0015; B29K; B29K2105/00; B29K2105/06; B29K2105/16; B29K2705/00; B29K2705/08; B29K2995/00; B29K2995/0003; B29K2995/0005; B29L; B29L2031/00; B29L2031/26; B29L2031/265
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
43 words
A gasket for sealing interstices between electrically conductive elements comprising: (a) a core comprising a resilient material; and (b) a coating overlying the core, said coating comprising a polythioether impregnated with particles of an electrically conductive material to render the coating electrically conductive.
Claim 2
Dependent Claim
43 words
A gasket for sealing interstices between electrically conductive elements comprising: (a) a core comprising a resilient material; and (b) a coating overlying the core, said coating comprising a polythioether impregnated with particles of an electrically conductive material to render the coating electrically conductive.
Claim 3
Dependent Claim
15 words
The gasket as recited in claim 1 wherein the coating further comprises an oxidizing inhibitor.
Claim 4
Dependent Claim
16 words
The gasket as recited in claim 2 wherein the material of the core is silicone rubber.
Claim 5
Dependent Claim
14 words
The gasket as recited in claim 3 wherein the electrically conductive material is nickel.
Claim 6
Dependent Claim
15 words
The gasket as in recited claim 4 wherein the oxidizing inhibitor is a metallic chromate.
Claim 7
Dependent Claim
75 words
A gasket comprising: means for sealing interstices between electrically conductive elements mated together for impeding electromagnetic energy from propagating through said interstices, said means for sealing comprising: (a) a core of a resilient material; and (b) a coating disposed about the core, said coating comprising: (i) a cured resin being a polythioether properties; (ii) particles of an electrically conductive material impregnated in said cured resin; and (iii) a metallic chromate type interspersed in the coating.
Claim 8
Dependent Claim
75 words
A gasket comprising: means for sealing interstices between electrically conductive elements mated together for impeding electromagnetic energy from propagating through said interstices, said means for sealing comprising: (a) a core of a resilient material; and (b) a coating disposed about the core, said coating comprising: (i) a cured resin being a polythioether properties; (ii) particles of an electrically conductive material impregnated in said cured resin; and (iii) a metallic chromate type interspersed in the coating.
Claim 9
Dependent Claim
40 words
The gasket as recited in claim 6 wherein the cured resin and the particles of an electrically conductive material impregnated in said cured resin is a nickel filled polythioether known as PR1764 and the metallic chromate type is aluminum chromate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-10 | 1994-06-11 | 1994-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-10 | 1998-06-11 | 1998-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-10 | 2002-06-11 | 2002-12-11 | $7700.00 | Window Closed / Lapsed |