Patent US4961994A successfully refreshed from Google Patents.
US4961994A
Expired / Lapsed
US
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Protective coated composite material
Assignee: Lockheed Martin Corp
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Filing: 1987-12-16
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Granted: 1990-10-09
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Expires: 2007-12-16
Abstract
Abstract An improved composite material which overcomes the moisture problem associated with other composite materials includes a protective waterproof coating of material such as a poly-para-xylylene over the composite material.
Inventors
- 👤 Frank E. Cariou
- 👤 Theodore A. Harris, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:52
CPC Classifications
B; B64; B64G; B64G1/00; B64G1/22; B64G1/52; B64G1/54; C; C08; C08J; C08J7/00; C08J7/04; C08J7/042; C08J7/0423; C08J7/043; C08J7/046; C09; C09D; C09D165/00; C09D165/04; C08G; C08G2261/00; C08G2261/30; C08G2261/34; C08G2261/342; C08G2261/3424; C08G2261/50; C08G2261/59; C08G2261/592; C08G2261/596; C08G2261/598; C08J2363/00; C08J2465/00; C08J2465/04; Y; Y10; Y10T; Y10T428/00; Y10T428/30; Y10T428/31504; Y10T428/31511
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
57 words
A protective coated composite material consisting essentially of: a graphite-epoxy composite material or a composite material containing graphite fibers, a poly-para-xylylene waterproofing layer over said composite material, a metal oxide layer over said waterproofing layer, a third layer of a reflecting metal over said metal oxide layer, and a second metal oxide layer over said third layer.
Claim 2
Dependent Claim
57 words
A protective coated composite material consisting essentially of: a graphite-epoxy composite material or a composite material containing graphite fibers, a poly-para-xylylene waterproofing layer over said composite material, a metal oxide layer over said waterproofing layer, a third layer of a reflecting metal over said metal oxide layer, and a second metal oxide layer over said third layer.
Claim 3
Dependent Claim
48 words
The combination of claim 1 wherein said poly-para-xylylene is deposited by thermal sublimation of the crystalline dimer, thermal cleavage of the dimer into highly reactive monomer-di-radicals, followed by spontaneous polymerization onto the surface of said composite material maintained in the temperature range of -50° C. to +50° C.
References Cited (Backward Citations)
GB879380A
Cited
GB998584A
Cited
GB1075094A
Cited
GB1101408A
Cited
GB1185939A
Cited
GB1266452A
Cited
US3671205A
Cited
GB1307642A
Cited
DE2008266A1
Cited
GB1349731A
Cited
US3716869A
Cited
GB1367590A
Cited
US3821013A
Cited
US3916418A
Cited
US4158079A
Cited
GB1544815A
Cited
US4115177A
Cited
US4166876A
Cited
US4123308A
Cited
US4341841A
Cited
US4448855A
Cited
US4320169A
Cited
US4333985A
Cited
US4337476A
Cited
US4450201A
Cited
US4465577A
Cited
EP0151985A2
Cited
EP0183052A2
Cited
EP0187458A1
Cited
US4686150A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-10-08 | 1994-04-09 | 1994-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-08 | 1998-04-09 | 1998-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-08 | 2002-04-09 | 2002-10-09 | $7700.00 | Window Closed / Lapsed |