Patent US3660319A successfully refreshed from Google Patents.
US3660319A
Expired / Lapsed
US
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Tertiary polyoxyalkylenepolyamines
Assignee: Texaco Inc
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Filing: 1970-12-08
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Granted: 1972-05-02
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Expires: 1990-12-08
Abstract
Abstract NEW TERTIARY AMINES PREPARED FROM POLYOXYALKYLENEPOLYAMINES ARE USEFUL CATALYST FOR PREPARING URETHANE FOAMS. THE NEW TERTIARY AMINES ARE PREPARED BY ALKYLATION OF THE POLYOXYALKYLENEPOLYAMINE WITH AN ALDEHYDE AND HYDROGENATION OF THE PRODUCT.
Inventors
- 👤 Ernest Leon Yeakey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:09
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/32; C08G65/321; C08G65/325; C08G65/3255; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/1833
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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |