US3567753A
Expired / Lapsed
US
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Polysiloxane-polyoxyalkylene copolymers
Assignee: Rhone Poulenc SA
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Filing: 1967-12-15
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Granted: 1971-03-02
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Expires: 1987-12-15
Abstract
Abstract GROUP WHEREIN G IS A HYDROCARBON RADICAL. THE INVENTION ALSO RELATES TO A PROCESS FOR PREPARING POLYURETHANE FOAMS EMPLOYING THESE COPOLYMERS. -OOC-G, -O-CO-O-G, -NH-G, -OOC-NH-G OR -NH-CO-G WHEREIN R AND R'' ARE LOWER ALKYL OR CYCLOALKYL OR ARYL GROUPS, N IS BETWEEN 2 AND 700, Q IS 0 OR AN INTEGER UP TO 3, THE GROUP R"O IS A(-CHXH2XO-)Y, WHEREIN X IS AN INTEGER FROM 2 TO 4, Y IS AN INTEGER OF AT LEAST 1 AND A IS A FORMYLOXY, (CH2-CH2-(CH2)Q-O-R")2 (R"-O-(CH2)Q-CH2-CH2)2-SI(-R)-(O-SI(-R'')2)N-O-SI(-R)- THE INVENTION RELATE TO NOVEL DIORGANOPOLYSILOXANE POLYOXYALKYLENE COPOLYMERS OF FORMULA:
Inventors
- 👤 Jean Claude Auguste Delaval
- 👤 Paul Alfred Eugene Guinet
- 👤 Jean Marius Ernest Morel
- 👤 Robert Raphael Puthet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:18
CPC Classifications
C; C10; C10M; C10M107/00; C10M107/50; C08; C08G; C08G77/00; C08G77/42; C08G77/46; C08J; C08J9/00; C08J9/0061; C08J2375/00; C08J2375/04; C08J2483/00; C10M2229/00; C10M2229/04; C10M2229/047; C10M2229/0475; C10N; C10N2030/00; C10N2030/06; C10N2030/08; C10N2040/00; C10N2040/36
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 |