Patent US3798184A successfully refreshed from Google Patents.
US3798184A
Expired / Lapsed
US
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Polyurethanes stabilized by incorporating the reaction product of acetone and diphenylamine
Assignee: Texaco Inc
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Filing: 1972-07-05
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Granted: 1974-03-19
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Expires: 1992-07-05
Abstract
Abstract POLYURETHANE COMPOSITIONS PREPARED FROM PARTICULAR POLYETHER POLYOLS ARE STABILIZED AGAINST DRY-HEAT DEGRADATION BY INCORPORATING THEREIN THE REACTION PRODUCT OF ACETONE AND DIPHENYLAMINE.
Inventors
- 👤 M Cuscurida
- 👤 D Rice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:02
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0028; C08G; C08G12/00; C08G12/02; C08G12/04; C08G12/06; C08G12/08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18; C08J2375/00; C08J2375/04; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/249988; Y10T428/249989
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |