US3943213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacturing high temperature graphite fiber-graphite composites
Assignee: Akzo NV
•
Filing: 1972-02-07
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Granted: 1976-03-09
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Expires: 1992-02-07
Abstract
Abstract Graphite composite, prepared by heating a material which forms a graphitizable carbon to mesophase, adding carbon fiber composite and carbonizing and graphitizing the shaped composite.
Inventors
- 👤 Mack P. Whittaker
- 👤 Frederick C. Miller
- 👤 Lloyd I. Grindstaff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:27
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/71; C04B35/78; C04B35/80; C04B35/83; C01; C01B; C01B32/00; Y; Y10; Y10S; Y10S264/00; Y10S264/19
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
43 words
A method of forming a graphite composite which consists in 1. heating a graphitizable carbon-forming material to form mesophase; 2. adding a graphitizable carbon fiber thereto; 3. forming or casting the shaped article from (2); and 4. carbonizing and graphitizing the formed article.
Claim 2
Independent Claim
43 words
A method of forming a graphite composite which consists in 1. heating a graphitizable carbon-forming material to form mesophase; 2. adding a graphitizable carbon fiber thereto; 3. forming or casting the shaped article from (2); and 4. carbonizing and graphitizing the formed article.
Claim 3
Dependent Claim
23 words
The method of claim 1 wherein the carbon fiber is selected from the group of carbon yarn, chopped fibers, felt, tow and batting.
Claim 4
Dependent Claim
21 words
The method of claim 1 wherein about 1 to about 50 weight percent of carbon fiber is added to step (2).
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-09 | 1979-09-08 | 1980-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-09 | 1983-09-08 | 1984-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-09 | 1987-09-08 | 1988-03-09 | $7700.00 | Window Closed / Lapsed |