US3567695A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blocked isocyanate polymer (iv)
Assignee: Union Carbide Corp
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Filing: 1968-04-02
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Granted: 1971-03-02
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Expires: 1988-04-02
Abstract
Abstract "BLOCKED" POLYISOCYANATO-CONTAINING POLYMERS WHICH MAY BE OBTAINED VIA THE VINYL POLYMERIZATION OF UNSATURATED DIESTER DIISOCYANATES AS EXEMPLIFIED BY BIS(2-ISOCYANATOETHYL) FUMARATE WITH/WITHOUT ETHYLENICALLY UNSATURATED COMPOUNDS, E.G., STYRENE, VINYL ACETATE, ETC., FOLLOWED BY REACTING THE POLYISOCYANATO GROUPS OF THE RESULTING POLYMERS WITH A MONOFUNCTIONAL ACTIVE HYDROGEN COMPOUND. THE ABOVE REACTIONS MAY ALSO BE REVERSED TO THUS OBTAIN THE "BLOCKED" POLYMERS.
Inventors
- 👤 Thomas K Brotherton
- 👤 John W Lynn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:37
CPC Classifications
C; C07; C07D; C07D493/00; C07D493/02; C07D493/08; C07C; C07C263/00; C07C263/16; C07C265/00; C07C265/02; C07C265/04; C08; C08F; C08F22/00; C08F22/10; C08F22/12; C08F22/22; C08G; C08G18/00; C08G18/02; C08G18/04; C08G18/06; C08G18/70; C08G18/72; C08G18/728; C08G18/74; C08G18/75; C08G18/758; C08G18/77; C08G18/771; C08G18/773; C08G18/81; C08G18/8125; C08G18/8141; C08J; C08J9/00; C08J9/04; D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/564; Y; Y10; Y10S; Y10S528/00; Y10S528/905; Y10S528/906
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |