US3711439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized polyurethane compositions
Assignee: BASF Corp
•
Filing: 1970-11-27
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Granted: 1973-01-16
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Expires: 1990-11-27
Abstract
Abstract IMPROVING THE HYDROLYTIC STABILITY OF THERMOPLASTIC ELASTOMER POLYURETHANES CONTAINING POLYCARBODIIMIDE AS HYDROLYSIS STABILIZER, BY ADDING CERTAIN MINOR PROPORTIONS OF N-(TRICHLOROMETHYLTHIO) PHTHALIMIDE.
Inventors
- 👤 F Loew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:55
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/29; C08K5/36; C08K5/43
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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |