US3700511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing tapes of longitudinally aligned carbon fibres
Assignee: UK Secretary of State for Defence
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Filing: 1970-07-31
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Granted: 1972-10-24
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Expires: 1990-07-31
Abstract
Abstract A METHOD OF PRODUCING TAPES OF CARBON FIBRES IN WHICH A SHEET OF LONGITUDINALLY ALIGNED POLYACRYLONITRILE FIBRES IS PYROLYSED AND SUBSEQUENTLY DIVIDED LONGITUDINALLY TO FORM A PLURALITY OF TAPES OF THE CARBON FIBRES THUS PRODUCED. D R A W I N G
Inventors
- 👤 Ian Whitney
- 👤 Edward Bailey White
- 👤 Michael Roger Rowland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:05
CPC Classifications
D; D01; D01F; D01F9/00; D01F9/08; D01F9/12; D01F9/14; D01F9/20; D01F9/21; D01F9/22; D01F9/32; Y; Y10; Y10S; Y10S264/00; Y10S264/19; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1084; Y10T156/1087
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |