US3746560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidized carbon fibers
Assignee: Akzo NV
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Filing: 1971-03-25
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Granted: 1973-07-17
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Expires: 1991-03-25
Abstract
Abstract CARBON FIBERS, SURFACE OXIDIZED AFTER FINAL CARBONIZATION BY CONTACT WITH AN ABOUT 6 N AQUEOUS OXYGEN-CONTAINING INORGANIC ACID SOLUTION CONTAINING A SOLUBLE CHLORATE SALT, IMPROVES FIBER-RESIN INTERFACIAL BOND IN COMPOSITES THEREOF.
Inventors
- 👤 J Goan
- 👤 L Joo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:48
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/06; D; D01; D01F; D01F11/00; D01F11/10; D01F11/12; D01F11/121; D01F11/122
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |