Patent US870806A successfully refreshed from Google Patents.
US3833402A
Expired / Lapsed
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Graphite fiber treatment
Assignee: United States Department of the Navy
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Filing: 1972-03-27
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Granted: 1974-09-03
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Expires: 1992-03-27
Abstract
Abstract High modulus graphite fiber reinforced composites with improved interlaminar shear strength are provided by depositing a metal containing compound on the graphite fiber, decomposing the metal containing compound at elevated temperatures in an inert atmosphere and then using the fiber to form a composite.
Inventors
- 👤 W Elban
- 👤 J Larsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:18
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/06; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18; C08K7/00; C08K7/02; C08K7/04; C08K7/06; D; D01; D01F; D01F11/00; D01F11/10; D01F11/12; D01F11/125; D01F11/127; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10T; Y10T428/00; Y10T428/12; Y10T428/12424; Y10T428/12444; Y10T428/29; Y10T428/2913; Y10T428/2918
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
9 words
The fiber obtained by the process of claim 1.
Claim 2
Dependent Claim
15 words
In composites comprising graphite fibers the improvement comprising incorporating the graphite fiber of claim 2.
Claim 3
Dependent Claim
14 words
The method of claim 1 wherein said graphite fiber is a high modulus fiber.
Claim 4
Dependent Claim
28 words
The method of claim 4 wherein said organo-metallic compound is deposited on said high modulus graphite fiber from a solution and the solvent is evaporated prior to decomposition.
Claim 5
Dependent Claim
27 words
The method of claim 5 wherein said organo-metallic compound is selected from the group consisting of dicyclopentadienyliron, ferric oxalate, ferric citrate, chromium acetylacetonate, dicyclopentadienylcobalt and mixtures thereof.
Claim 6
Dependent Claim
9 words
The fiber obtained by the process of claim 4.
Claim 7
Dependent Claim
15 words
In composites comprising graphite fibers the improvement comprising incorporating the graphite fiber of claim 7.
Claim 8
Dependent Claim
9 words
The fiber obtained by the process of claim 6.
Claim 9
Dependent Claim
14 words
In composites comprising graphite fibers the improvement comprising incorporating the fiber of claim 9.
Claim 10
Dependent Claim
26 words
The method of claim 1 wherein said organo-metallic compound is deposited on said graphite fiber from a solution and the solvent is evaporated prior to decomposition.
Claim 11
Dependent Claim
27 words
The method of claim 11 wherein said organo-metallic compound is selected from the group consisting of dicyclopentadienyliron, ferric oxalate, ferric citrate, chromium acetylacetonate, dicyclopentadienylcobalt and mixtures thereof.
Claim 12
Dependent Claim
9 words
The fiber obtained by the process of claim 12.
Claim 13
Dependent Claim
14 words
In composites comprising graphite fibers the improvement comprising incorporating the fiber of claim 13.
References Cited (Backward Citations)
US3356525A
Cited
US3627570A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |