Patent US5162898A successfully refreshed from Google Patents.
Patent US3433845A successfully refreshed from Google Patents.
US3433845A
Expired / Lapsed
US
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Process of solubilizing,via hydrogenation,alpha-methylstyrene polymers and product obtained thereby
Assignee: Sinclair Research Inc
•
Filing: 1966-03-14
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Granted: 1969-03-18
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Expires: 1986-03-14
Abstract
No abstract record available.
Inventors
- 👤 Stephen M Kovach
- 👤 Robert A Sanford
- 👤 David W Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:01
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2732371A
Cited
US2603655A
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US2898387A
Cited
US3192218A
Cited
DE1196186B
Cited
US3268608A
Cited
US3352934A
Cited
US3370010A
Cited
US3336409A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |