US3285696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the preparation of flexible carbon fibre
Assignee: Tokai Denkyoku Seizo KK
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Filing: 1963-04-05
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Granted: 1966-11-15
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Expires: 1983-04-05
Abstract
No abstract record available.
Inventors
- 👤 Tsunoda Yasugoro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:00
CPC Classifications
D; D01; D01F; D01F9/00; D01F9/08; D01F9/12; D01F9/14; D01F9/20; D01F9/21; D01F9/22; D01F9/225; D06; D06M; D06M11/00; D06M11/32; D06M11/34; Y; Y10; Y10S; Y10S264/00; Y10S264/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A METHOD FOR THE PREPARATION OF FLEXIBLE HEAT RESISTANT AND CORROSION RESISTANT FIBRE, COMPRISING PRETREATING A FIBRE, WHICH IS TO BE CARBONIZED AND WHICH IS SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE HOMOPOLYMER AND ACRYLONITRILE COPOLYMER PREPARED FROM NOT LESS THAN 85 MOL PERCENT OF ACRYLONITRILE AND NOT MORE THAN 15 MOL PERCENT OOF A MONOVINYL COMPOUND, BY HEATING THE FIBRE AT A TEMPERATURE OF FROM MONOVINYL COMPOUND, BY HEATING THE OXYGEN CONTAINING ATMOSPHERE FOR A TIME SUFFICIENT TO BLACKEN THE FIBRE, AND THEN CARBONIZING THE BLACKENED FIBRE AT A TEMPERATURE BETWEEN 700* AND 1200*C. FOR NOT LESS THAN ONE HOUR IN AN INERT ATMOSPHERE TO FORM A CARBONIZED FIBRE.
Claim 2
Independent Claim
110 words
A METHOD FOR THE PREPARATION OF FLEXIBLE HEAT RESISTANT AND CORROSION RESISTANT FIBRE, COMPRISING PRETREATING A FIBRE, WHICH IS TO BE CARBONIZED AND WHICH IS SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE HOMOPOLYMER AND ACRYLONITRILE COPOLYMER PREPARED FROM NOT LESS THAN 85 MOL PERCENT OF ACRYLONITRILE AND NOT MORE THAN 15 MOL PERCENT OOF A MONOVINYL COMPOUND, BY HEATING THE FIBRE AT A TEMPERATURE OF FROM MONOVINYL COMPOUND, BY HEATING THE OXYGEN CONTAINING ATMOSPHERE FOR A TIME SUFFICIENT TO BLACKEN THE FIBRE, AND THEN CARBONIZING THE BLACKENED FIBRE AT A TEMPERATURE BETWEEN 700* AND 1200*C. FOR NOT LESS THAN ONE HOUR IN AN INERT ATMOSPHERE TO FORM A CARBONIZED FIBRE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |