US3470139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of caprolactam in the presence of catalyst,initiator and a crystallization modifier
Assignee: Akzo Nobel UK PLC
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Filing: 1966-01-13
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Granted: 1969-09-30
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Expires: 1986-01-13
Abstract
No abstract record available.
Inventors
- 👤 Geoffrey Marshall
- 👤 Gordon Ernest Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:24
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14; C08G69/16; C08G69/18; C08L; C08L77/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2241321A
Cited
US3061592A
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US3166533A
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US3298977A
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US3308099A
Cited
US3252905A
Cited
US3296063A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |