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US3429856A
Expired / Lapsed
US
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Polyurethanes cured with 4,4'-methylene-bis-(o-trifluoromethylaniline)
Assignee: EIDP Inc
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Filing: 1967-07-21
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Granted: 1969-02-25
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Expires: 1987-07-21
Abstract
No abstract record available.
Inventors
- 👤 Guenther Kurt Hoeschele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:43
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2929800A
Cited
US2765341A
Cited
US3194793A
Cited
US3253031A
Cited
FR1371587A
Cited
US3297758A
Cited
US3345412A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |