US3817882A
Expired / Lapsed
US
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Process for producing urethane foam in the presence of a siloxane-oxalkylene block copolymer
Assignee: Union Carbide Corp
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Filing: 1966-07-22
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Granted: 1974-06-18
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Expires: 1986-07-22
Abstract
Abstract AN IMPROVEMENT IN THE ART OF URETHANE FOAMS IS DESCRIBED. THE IMPROVEMENT RESIDES IN THE USED OF A TERTIARY AMINE CATALYST IN COMBINATION WITH A SILOXANE-OXYALKYLENE BLOCK COPOLYMER SURFACTANT IN THE PRODUCTION OF POLYETHER-BASED URETHANE FOAMS.
Inventors
- 👤 F Hostettler
- 👤 E Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:30
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/161; C08G18/163; C08G18/165; C08G18/28; C08G18/40; C08G18/48; C08G2110/00; C08G2110/0041; C08G2110/005; C08G2110/0083; C08J2375/00; C08J2375/04; C08J2375/08; 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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |