US3715253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite materials
Assignee: Susquehanna Corp
•
Filing: 1969-08-28
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Granted: 1973-02-06
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Expires: 1989-08-28
Abstract
Abstract A method for making shaped pyrolytic graphite articles which comprises progressively positioning continuous carbon strand onto a shaped form and simultaneously pyrolyzing carbonaceous gas onto the strand at about the point of positioning contact to nucleate pyrolytic graphite from the strand, progressively positioning additional strand laterally spaced from previously positioned strand and, as the additional strand is positioned, simultaneously pyrolyzing the carbonaceous gas on the additional strand at about the point of positioning contact and on the pyrolytic graphite nucleated from previously positioned strand to form a continuous pyrolytic graphite matrix interconnecting laterally shaped strands.
Inventors
- 👤 E Olcott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:19
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; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/108; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
97 words
A method of making a composite material, said method comprising progressively positioning continuous carbon strand on a shaped form, pyrolyzing carbonaceous gas on said strand at about the point of positioning contact as said strand is positioned to nucleate pyrolytic graphite from said strand, progressively positioning additional continuous carbon strand laterally spaced from previously positioned strand and, as said additional strand is positioned, simultaneously pyrolyzing carbonaceous gas on said additional strand at about the point of positioning contact and on pyrolytic graphite nucleated from previously positioned strand to form a pyrolytic graphite matrix interconnecting laterally spaced strands.
Claim 2
Independent Claim
97 words
A method of making a composite material, said method comprising progressively positioning continuous carbon strand on a shaped form, pyrolyzing carbonaceous gas on said strand at about the point of positioning contact as said strand is positioned to nucleate pyrolytic graphite from said strand, progressively positioning additional continuous carbon strand laterally spaced from previously positioned strand and, as said additional strand is positioned, simultaneously pyrolyzing carbonaceous gas on said additional strand at about the point of positioning contact and on pyrolytic graphite nucleated from previously positioned strand to form a pyrolytic graphite matrix interconnecting laterally spaced strands.
Claim 3
Dependent Claim
14 words
The method of claim 1 wherein said continuous carbon strand is an individual strand.
Claim 4
Dependent Claim
26 words
The method of claim 1 wherein said continuous carbon strand is a strand layer comprising a plurality of laterally spaced, substantially unidirectionally oriented individual carbon strands.
Claim 5
Dependent Claim
18 words
The method of claim 1 wherein said continuous carbon strand is a plurality of interwoven individual carbon strands.
Claim 6
Dependent Claim
15 words
The method of claim 1 wherein said continuous carbon strand is precoated with pyrolytic graphite.
Claim 7
Dependent Claim
22 words
The method of claim 1 further comprising mechanically removing pyrolytic graphite coated fibers protruding from said strand after pyrolyzing carbonaceous gas thereon.
Claim 8
Independent Claim
95 words
A method of making a composite material, said method comprising a. winding a continuous individual carbon strand around a shaped form and simultaneously pyrolyzing a carbonaceous gas on said strand at about the point of winding contact to nucleate pyrolytic graphite from said strand, b. winding additional turns of said strand around said form, each of said additional turns being spaced from previously wound turns and, as each of said additional turns is wound, simultaneously pyrolyzing carbonaceous gas thereon at about the point of winding contact and on pyrolytic graphite nucleated on previously wound turns.
Claim 9
Independent Claim
95 words
A method of making a composite material, said method comprising a. winding a continuous individual carbon strand around a shaped form and simultaneously pyrolyzing a carbonaceous gas on said strand at about the point of winding contact to nucleate pyrolytic graphite from said strand, b. winding additional turns of said strand around said form, each of said additional turns being spaced from previously wound turns and, as each of said additional turns is wound, simultaneously pyrolyzing carbonaceous gas thereon at about the point of winding contact and on pyrolytic graphite nucleated on previously wound turns.
Claim 10
Independent Claim
112 words
A method of making a composite material, said method comprising a. simultaneously winding a continuous, individual carbon strand around a shaped form disposed within a chamber containing substantially non-oxidizing gases at a pressure greater than the ambient pressure around said chamber and pyrolyzing a carbonaceous gas on said strand at about the point of winding contact to nucleate pyrolytic graphite from said strand, b. winding additional turns of said strand around said form, said turns being spaced within about .1 inch of each other, and as each additional turn is wound, simultaneously pyrolyzing carbonaceous gas thereon at about the point of winding contact and on pyrolytic graphite nucleated on previously wound turns.
Claim 11
Independent Claim
112 words
A method of making a composite material, said method comprising a. simultaneously winding a continuous, individual carbon strand around a shaped form disposed within a chamber containing substantially non-oxidizing gases at a pressure greater than the ambient pressure around said chamber and pyrolyzing a carbonaceous gas on said strand at about the point of winding contact to nucleate pyrolytic graphite from said strand, b. winding additional turns of said strand around said form, said turns being spaced within about .1 inch of each other, and as each additional turn is wound, simultaneously pyrolyzing carbonaceous gas thereon at about the point of winding contact and on pyrolytic graphite nucleated on previously wound turns.
Claim 12
Dependent Claim
13 words
The method of claim 7 wherein said strand is precoated with pyrolytic graphite.
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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) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |