US3564037A
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Novel polysiloxane-polyalkylene copolymers
Assignee: Rhone Poulenc SA
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Filing: 1967-12-18
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Granted: 1971-02-16
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Expires: 1987-12-18
Abstract
Abstract THE INVENTION RELATES TO COPOLYMERS OF GENERAL FORMULA R1-O-(CH2)Q-CH2-CH2-SI(-R)(-O-R1)-(O-SI(-R)2)N-O- SI(-R)(-O-R1)-CH2-CH2-(CH2)Q-O-R1 WHEREIN R IS AN ALKY, CYCLOALKYL, PHENYL, ALKYLPHENYL OR PHENYLALKYL GROUP, N IS BETWEEN 2 AND 700, Q IS 0 TO 3, AND R1O- IS A GROUP OF GENERAL FORMULA A(-CXH2XO-)Y, WHEREIN X IS 2 TO 4, Y IS AT LEAST ONE, AND A IS HYDROXY, FORMYLOXY, -OG,-OCOG, -OOC-O-G -NHG, -OCONHG OR -NHCOG, WHEREIN G IS A HYDROCARBON RADICAL. THE COPOLYMERS ARE USEFUL AS SURFACE ACTIVE AGENTS IN THE PREPARATION OF POLYURETHANE FOAMS.
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
2026-11-01 07:58
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08G; C08G77/00; C08G77/42; C08G77/46; C08J2375/00; C08J2375/04; C08J2483/00
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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |