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US3468841A
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Compositions of carbon black and polyacrylonitrile and method for their preparation
Assignee: Crylor SA
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Filing: 1966-05-02
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Granted: 1969-09-23
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Expires: 1986-05-02
Abstract
No abstract record available.
Inventors
- 👤 Paul Jacques Corbiere
- 👤 Jean-Baptiste Rosset
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:13
CPC Classifications
D; D01; D01F; D01F1/00; D01F1/02; D01F1/04; C; C08; C08F; C08F2/00; C08F2/12; C08F2/16; C08F2/36; C08F2/44; C08F20/00; C08F20/02; C08F20/42; C08F20/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3117943A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |