US3538149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly(alpha,beta-unsaturated benzyl esters)
Assignee: Wyeth Holdings LLC
•
Filing: 1966-09-28
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Granted: 1970-11-03
•
Expires: 1986-09-28
Abstract
No abstract record available.
Inventors
- 👤 Joseph Adrian Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:29
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/30; C08C19/34; C08C19/36; C07; C07D; C07D203/00; C07D203/04; C07D203/06; C07D203/08; C07D203/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2129667A
Cited
US2359622A
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US2542417A
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US2856375A
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US2830078A
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US2855434A
Cited
US2965622A
Cited
US3022355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |