US3629049A
Expired / Lapsed
US
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Shaped pyrolytic graphite articles
Assignee: Susquehanna Corp
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Filing: 1966-11-08
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Granted: 1971-12-21
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Expires: 1986-11-08
Abstract
Abstract A shaped pyrolytic graphite article comprising a pyrolytic graphite matrix containing embedded therein at least one reinforcing carbon strand layer. The carbon strand layer comprises a plurality of unidirectional and substantially parallel, laterally spaced, individual, continuous carbon strands. The matrix comprises crystallite layers of pyrolytic graphite nucleated from each of the individual carbon strands and interconnected to form a continuous phase surrounding and interconnecting the individual strands comprising the embedded strand layer.
Inventors
- 👤 Eugene L Olcott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:15
CPC Classifications
D; D01; D01F; D01F11/00; D01F11/10; D01F11/12; D01F11/125; C; C01; C01B; C01B32/00; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/56; C04B35/71; C04B35/78; C04B35/80; C04B35/83; D01F9/00; D01F9/08; D01F9/12; D01F9/14; D01F9/16; Y; Y10; Y10S; Y10S273/00; Y10S273/23; Y10S428/00; Y10S428/902; Y10T; Y10T428/00; Y10T428/24; Y10T428/24058; Y10T428/24132; Y10T428/249921; Y10T428/249924; Y10T428/249928; Y10T428/249929; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/292
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
22 words
The shaped pyrolytic graphite articles of claim 1 wherein said at least one reinforcing carbon strand layer comprises a plurality of layers.
Claim 2
Dependent Claim
41 words
The shaped pyrolytic graphite article of claim 2 wherein the unidirectional, substantially parallel strands comprising at least one carbon strand layer are oriented in a direction different from the unidirectional, substantially parallel strands comprising at least one other carbon strand layer.
Claim 3
Dependent Claim
29 words
The shaped pyrolytic graphite article of claim 1 wherein said individual continuous carbon strands have a lateral spacing between adjacent strands of substantially no greater than about 0.1 inch.
Claim 4
Dependent Claim
29 words
The shaped pyrolytic graphite article of claim 2 wherein said individual continuous carbon strands have a lateral spacing between adjacent strands of substantially no greater than about 0.1 inch.
Claim 5
Dependent Claim
29 words
The shaped pyrolytic graphite article of claim 3 wherein said individual continuous carbon strands have a lateral spacing between adjacent strands of substantially no greater than about 0.1 inch.
Claim 6
Dependent Claim
19 words
The shaped pyrolytic graphite article of claim 1 wherein said individual, continuous carbon strands are precoated with pyrolytic graphite.
Claim 7
Dependent Claim
19 words
The shaped pyrolytic graphite article of claim 2 wherein said individual, continuous carbon strands are precoated with pyrolytic graphite
Claim 8
Dependent Claim
19 words
The shaped pyrolytic graphite article of claim 3 wherein said individual, continuous carbon strands are precoated with pyrolytic graphite.
References Cited (Backward Citations)
US3367812A
Cited
US3369920A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |