US3304148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon cloth annealing process
Assignee: Champlain Cable Corp
•
Filing: 1963-06-17
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Granted: 1967-02-14
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Expires: 1983-06-17
Abstract
No abstract record available.
Inventors
- 👤 John B Gallagher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:22
CPC Classifications
D; D01; D01F; D01F9/00; D01F9/08; D01F9/12; D01F9/14; D01F9/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A PROCESS OF IMPROVING THE BURST STRENGTH OF CARBON FIBERS WHICH HAD BEEN PREPARED BY CARBONIZING CELLULOSE FIBERS IN A NON-OXIDIZING ATMOSPHERE AT ELEVATED TEMPERATURES, SAID PROCESS COOMPRISING TREATING THE CARBON FIBERS AT A TEMPERATURE OF AT LEAST 800*F. IN THE PRESENCE OF AN ATMOSPHERE CONTAINING AT LEAST 5% OXYGEN.
Claim 2
Dependent Claim
50 words
A PROCESS OF IMPROVING THE BURST STRENGTH OF CARBON FIBERS WHICH HAD BEEN PREPARED BY CARBONIZING CELLULOSE FIBERS IN A NON-OXIDIZING ATMOSPHERE AT ELEVATED TEMPERATURES, SAID PROCESS COOMPRISING TREATING THE CARBON FIBERS AT A TEMPERATURE OF AT LEAST 800*F. IN THE PRESENCE OF AN ATMOSPHERE CONTAINING AT LEAST 5% OXYGEN.
References Cited (Backward Citations)
US3011981A
Cited
US3079266A
Cited
US3174895A
Cited
US3116975A
Cited
US3171720A
Cited
US3179605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |