US3801532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rapid-setting polyurethanes from diols and polyfunctional isocyanates
Assignee: Individual
•
Filing: 1973-05-07
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Granted: 1974-04-02
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Expires: 1993-05-07
Abstract
Abstract MIXTURES COMPRISING A LOW MOLECULAR WEIGHT DIOL, A LIQUID MODIFIER COMPOUND HAVING A BOILING POINT ABOVE ABOUT 150*C., SUCH AS A HALOGENATED ALIPHATIC COMPOUND, A POLYISOCYANATE HAVING A FUNCTIONALITY OF AT LEAST ABOUT 2.5 AND AN ORGANOMETALLIC CATALYST, INSTANTLY SET, AFTER A BRIEF INDUCTION PERIOD, TO A SOLID, DENSE, RIGID POPOLYMERIC PRODUCT WHICH CAN BE DEMOLDED WITHIN A PERIOD OF FROM LESS THAN 1 MINUTE TO ABOUT 5 MINUTES.
Inventors
- 👤 Franciszek Olstowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:56
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/28; C08G18/30; C08G18/32; C08G18/3203; C08G18/40; C08G18/48; C08K; C08K5/00; C08K5/02
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |