US3640997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sucrose-ethylene diamine polyols and process for preparing same
Assignee: BASF Corp
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Filing: 1969-05-07
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Granted: 1972-02-08
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Expires: 1989-05-07
Abstract
Abstract A SUCROSE-ETHYLENE DIAMINE OLYOL IS PREPARED BY REACTING A MIXTURE OF SUCROSE AND ETHYLENE DIAMINE WITH AN ALKYLENE OXIDE IN THE PRESENCE OF A CAUSTIC CATALYST. THE POLYOL IS USED TO PREPARE POLYURETHANE FOAM PRODUCTS HAVING EXCELLENT DIMENSIONAL STABILITY AND PHYSICAL PROPERTIES. THE POLYURETHANE FOAMS ARE USED IN PREPARING MOLDED ARTICLES AND AS INSULATION FOR REFRIGERATORS, FREEZERS, AND THE LIKE.
Inventors
- 👤 Walter R Fijal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:46
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/02; C07H15/04; C07H15/08; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/487; C08G18/4883; C08G18/50; C08G18/5021; C08G2110/00; C08G2110/0025; C08G2110/0041
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |