US3748288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing substantially nonlustrous open pore polyurethane foams in situ and foam prepared thereby
Assignee: GFC FOAM Corp A CORP OF DE
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Filing: 1971-12-27
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Granted: 1973-07-24
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Expires: 1991-12-27
Abstract
Abstract THIS INVENTION PROVIDES A SUBSTANTIALLY NONLUSTROUS, HIGHLY OPEN POLYESTER-TYPE URETHANE FOAM BY THE ADDITION OF A MINRO PROPORTION OF A CONVENTIONAL POLYETHER POLYOL REAGENT AND A SMALL AMOUNT OF A HYDROPHOBIC, ANTIFOAMING ORGANO-SILICON COMPOUND. PREFERABLY, A POLYETHER-POLYOL TYPE FOAM-STABILIZING ORGANO-SILICON EMULSIFIER IS ADDED. PIGMENTS AND OTHER CONVENTIONAL ADDITIVES CAN ALSO BE ADDED IF DESIRED.
Inventors
- 👤 J Winkler
- 👤 C Bredbenner
- 👤 L Adlum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:25
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/4009; C08G18/4018; C08G18/42; C08G18/4244; C08G18/4247; C08G18/425; C08G2110/00; C08G2110/0008; C08G2110/0016; C08G2110/0041; C08G2110/005; C08G2110/0083; C08G2340/00; C08J2375/00; C08J2375/04; C08J2483/00
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) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |