US3574172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly(alkylether thiol anhydrides)
Assignee: Stauffer Chemical Co
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Filing: 1968-09-18
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Granted: 1971-04-06
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Expires: 1988-09-18
Abstract
Abstract WHEREIN R IS A DIVALENT ALIPHATIC HYDROCARBON RADICAL CONSISTING ESSENTIALLY OF HYDROGEN AND CARBON, Y IS SULFUR OR OXYGEN AND N IS AN INTERGER REPRESENTING THE NUMBER OF REPEATING UNTIS. POLYMER COMPOSITIONS ARE ALSO PROVIDED COMPRISING VINYL TYPE POLYMERS CONTAINING THE NOVEL THIO ANHYDRIDE COMPOSITIONS OF THIS INVENTION AS STABILIZERS THEREFOR. -(CO-R-Y-R-CO-S)N- NOVEL POLY(ALKYLETHER THIOL ANHYDRIDES) ARE PROVIDED HAVING THE FORMULA:
Inventors
- 👤 Walter Stamm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:05
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |