US3567763A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ester polyisocyanates
Assignee: Rohm and Haas Co
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Filing: 1966-01-06
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Granted: 1971-03-02
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Expires: 1986-01-06
Abstract
Abstract THESE ARE PROVIDED ESTER ISOCATNES HAVING THE FORMULAE (O=C=N)M-R2-COO-R1-OOC-R3-(N=C=O)N AND (O=C=N-R6-OOC)M-R7-(N=C=O)N WHEREIN M AND N ARE EITHER ONE OR TWO, R1 THE DIESTER RESIDUE OF AN ALKANE OR CYCLOALKANE DIOL HAVING TWO PRIMARY HYDROXYL GROUPS, FROM 2 TO 18 CARBON ATOMS, AND UP TO ONE HETERO OXYGEN OR SULFUR ATOM, R2 AND R3 ARE ALKYLENE OR CYCLOALKYLENE, R6 IS AN ALKYLENE RADICAL HAVING 2 TO 8 CARBON ATOMS AND UP TO ONE HETERO OXYGEN OR SULFUR ATOM, AND R7 IS ALKYLENE OR CYCLOALKYLENE.
Inventors
- 👤 William D Emmons
- 👤 Jerome F Levy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:46
CPC Classifications
C; C07; C07C; C07C265/00; C07C265/02; C07C265/04; C07C227/00; C07C227/14; C07C227/18; C07C229/00; C07C229/02; C07C229/04; C07C229/06; C07C229/08; C07C229/24; C07C229/52; C07C229/54; C07C229/60; C07C263/00; C07C263/04; C07C265/12; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/771
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) | 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 |