Patent US3767743A successfully refreshed from Google Patents.
US3767743A
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Method for preparing microcellular polyurethane elastomers with integral skins using a combination of tertiary amine organomercury compound and organolead as catalyst
Assignee: Qo Chemicals Inc
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Filing: 1972-01-12
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Granted: 1973-10-23
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Expires: 1992-01-12
Abstract
Abstract THIS INVENTION RELATES TO A METHOD FOR PREPARING MICROCELLULAR ELASTOMERS HAVING INTEGRAL SKINS WHICH ARE SUBSTANTIALLY NON-POROUS, SAID METHOD COMPRISING CONTACTING A MIXTURE OF SPECIFIED POLYOLS WITH METHYLENE BIS(4-PHENYL-ISOCYANATE) IN THE PRESENCE OF A BLOWING AGENT AND A CATALYST SYSTEM CONSISTING OF A TERTIARY AMINE, AN ORGANOMERCURY COMPOUND, AND AN ORGANOLEAD COMPOUND.
Inventors
- 👤 F Hostettler
- 👤 G Huffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:52
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/34; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/161; C08G18/163; C08G18/28; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6674; C08G18/6677; C08G18/6681; C08G18/6688; C08G2110/00; C08G2110/0008; C08G2110/0033; C08G2110/0041; C08G2110/0066; C08G2350/00; C08G2380/00; C08J2375/00; C08J2375/04; C08J2375/08; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249978; Y10T428/249979; Y10T428/249987; Y10T428/249988; Y10T428/249989
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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |