Patent US3732176A successfully refreshed from Google Patents.
US3732176A
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Low resiliency microcellular polyurethane elastomer with integral skin and method for preparation thereof
Assignee: Qo Chemicals Inc
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Filing: 1972-01-12
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Granted: 1973-05-08
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Expires: 1992-01-12
Abstract
Abstract THIS INVENTION RELATES TO A METHOD FOR PREPARING CERTAN MICROCELLULAR ELASTOMERS HAVING LOW RESILIENCY AND AN INTEGRAL SKIN WHICH IS SUBSTANTIALLY NON-POROUS COMPRISING CONTACTING CERTAIN POLYETHER GLYCOLS AND ETHYLENE OXIDE CAPPED 4,4''-ISOPROPYLIDENEDIPHENOL WITH METHYLENE BIS(4-PHENYLISOCYANATE) IN THE PRESENCE OF A BLOWING AGENT AND A CATALYST SYSTEM CONSISTING OF A TERTIARY AMINE AND AN ORGANOTIN COMPOUND.
Inventors
- 👤 F Hostettler
- 👤 G Huffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:47
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/487; C08G18/4879; C08G18/4804; C08G18/4808; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7657; C08G18/7664; C08G18/7671; C08G2110/00; C08G2110/0033; C08G2110/0041; C08G2110/0066; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249978; Y10T428/249987; Y10T428/249988; Y10T428/249989
Claims Analysis
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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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |