Patent US3546176A successfully refreshed from Google Patents.
US3546176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of unsaturated polyesters
Assignee: Scott Bader Co Ltd
•
Filing: 1966-12-08
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Granted: 1970-12-08
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Expires: 1986-12-08
Abstract
No abstract record available.
Inventors
- 👤 John Herbert Umfreville
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:39
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08G63/56; C08G63/58; C08G63/68; C08G63/682; C08G63/6824; C08G63/6828
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3326965A
Cited
US3056817A
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US3056818A
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US2985616A
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US2966479A
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US3257477A
Cited
US3254060A
Cited
US3245959A
Cited
US3374208A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-07 | 1974-06-08 | 1974-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-07 | 1978-06-08 | 1978-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-07 | 1982-06-08 | 1982-12-08 | $7700.00 | Window Closed / Lapsed |