US3783152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-arylene polycarbamate
Assignee: WR Grace and Co Conn
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Filing: 1972-04-27
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Granted: 1974-01-01
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Expires: 1992-04-27
Abstract
Abstract The invention disclosed is for a method of preparing polythioether-polyurethane products from a new and novel class of polyene compositions which are formed as the reaction product of a monomeric polyisocyanate with an unsaturated monohydroxy or monoamino compound. The new polyenes may be compounded with a polythiol component having molecules containing at least two thiol groups per molecule. The curable polymer composition may be cured by a free radical generator such as actinic light to form a solid polythioether-polyurethane elastomeric or resinous product.
Inventors
- 👤 D Larsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:14
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/12; C08G18/00; C08G18/06; C08G18/83; C08G18/834; C08G18/835; C08G75/02; C08G75/04; C08G75/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2806838A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |