US3793300A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible polyester urethane foams using liquid siloxane-oxyalkylene polymeric foam stabilizers
Assignee: Union Carbide Corp
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Filing: 1972-06-26
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Granted: 1974-02-19
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Expires: 1992-06-26
Abstract
Abstract ORGANOSILICONE POLYMERS ARE PROVIDED CONTAINING MONOMERIC UNITS A, B AND C WHERE A IS SIO4/2, B IS A POLYFUNCTIONAL SILOXY UNIT IN WHICH SILICON IS BONDED TO AT LEAST ONE ORGANIC MOIETY BEARING A POLY(OXYALKYLENE) CHAIN, AND C IS A MONOFUNCTIONAL TRIORGANOSILOXY UNIT, AND IN WHICH THERE ARE FROM ABOUT 0.4 TO ABOUT 2 MOLES OF A, AND FROM ABOUT 0.2 TO ABOUT 2 MOLES OF C, PER MOLE OF B. THE POLYMERS ARE USEFUL AS SURFACTANTS AND FIND PARTICULAR APPLICATION IN THE MANUFACTURE OF FLEXIBLE POLYESTER URETHANE CELLULAR PRODUCTS, INCLUDING FLAMERETARDED FOAMS.
Inventors
- 👤 B Prokai
- 👤 B Kanner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:28
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08G; C08G77/00; C08G77/04; C08G77/06; C08G77/42; C08G77/46; C08J2375/00; C08J2375/04; C08J2375/06; C08J2483/00; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/06
Claims Analysis
Total Claims: 0
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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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |