Patent US3799898A successfully refreshed from Google Patents.
US3799898A
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Stable hydrophilic polyurethane foams prepared by using a surfactant soluble in the hydrophilic polyol reactant
Assignee: Foamex LP
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Filing: 1972-10-16
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Granted: 1974-03-26
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Expires: 1992-10-16
Abstract
Abstract HYDROPHILIC POLYURETHANE FOAMS WHICH ARE FLEXIBLE AND STABLE, I.E., NON-COLLAPSIBLE AND NON-SHRINKABLE, NON-DISINTEGRATABLE AND CHARACTERIZED BY IMPROVED "WET-OUT" AND "PERCENT VOLUME-SWELL" PROPERTIES, ARE PRODUCED FROM A FOAMABLE POLYURETHANE-FORMING REACTION MIXTURE COMPRISING (A) A HYDROPHILIC POLYOL, (B) A FOAM-STABILIZING AMOUNT OF A SURFACTANT WHICH IS SOLUBLE IN SAID HYDROPHILIC POLYOL AND, IF DESIRED, (C) A FOAM-SHINKAGE INHIBITING AGENT.
Inventors
- 👤 R Lamplugh
- 👤 R Triolo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:13
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/2805; C08G18/2815; C08G18/282; C08G18/2825; C08G18/285; C08G18/2865; C08G18/40; C08G18/48; C08G18/4833; C08J; C08J9/00; C08J9/0061; C08J9/0095; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18; C08L; C08L75/00; C08L75/04; C08L83/00; C08L83/04; C08G2110/00; C08G2110/0008; C08G2110/0041; C08G2110/005; C08G2110/0083; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S521/00; Y10S521/905
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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |