US3533986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamides
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1967-02-28
•
Granted: 1970-10-13
•
Expires: 1987-02-28
Abstract
No abstract record available.
Inventors
- 👤 Geoffrey Spencer Davy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:41
CPC Classifications
C; C08; C08L; C08L77/00; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB890437A
Cited
US3210428A
Cited
US3196185A
Cited
US3228898A
Cited
US3260697A
Cited
US3374288A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-12 | 1974-04-13 | 1974-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-12 | 1978-04-13 | 1978-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-12 | 1982-04-13 | 1982-10-13 | $7700.00 | Window Closed / Lapsed |