Patent US3645982A successfully refreshed from Google Patents.
US3645982A
Expired / Lapsed
US
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Synthesis of poly(allyl urethanes)
Assignee: WR Grace and Co
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Filing: 1969-11-24
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Granted: 1972-02-29
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Expires: 1989-11-24
Abstract
Abstract ALLYL URETHANE IS FORMED BY REACTING A SOLUTION OF AN ALLYL HALIDE, AN ALKALI METAL CYANATE AND A PLYOL. THE ALLYL URETHANES ARE USEFUL IN THE PREPARATION OF PHOTOCURABLE LIQUID POLYMERS, THAT ARE PHOTOCURED BY THE FREE RADICAL ADDITION OF THIOL GROUPS OF POLYTHIOLS TO THE ALLYL DOUBLE BONDS.
Inventors
- 👤 Donald W Larsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:39
CPC Classifications
C; C08; C08F; C08F246/00
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |