US3786030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst for trimerizing polyisocyanates
Assignee: 3M Co
•
Filing: 1972-04-05
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Granted: 1974-01-15
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Expires: 1992-04-05
Abstract
Abstract CERTAIN DIALKYLAMINOALKYLURETHANES, FORMED BY THE REACTION OF ISOCYANATES WITH CERTAIN N,N-DIALKYLALKANOLAMINES, ARE USED AS LATEN CATALYST FOR THE CROSS-LINKING OR TRIMERIZATION OF POLYISOCYANATE-TERMINATED PREPOLYMERS.
Inventors
- 👤 D Rice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:26
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/1841; C08G18/10
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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |