US3148162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a polyetherurethane using an aromatic tin catalyst
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1960-04-27
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Granted: 1964-09-08
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Expires: 1980-04-27
Abstract
No abstract record available.
Inventors
- 👤 George T Gmitter
- 👤 Emery V Braidich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:50
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/22; C08G18/24; C08G18/242; C07; C07F; C07F7/00; C07F7/22; C08G18/28; C08G18/40; C08G18/4009; C08G18/4018; C08G2110/00; C08G2110/0008; C08G2110/0016; C08G2110/0025; C08G2110/0083; C08G2380/00; C08G2410/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
THE METHOD WHICH COMPRISES REACTING (1) AT LEAST ONE ORGANIC POLYISOCYANATE WITH (2) AT LEAST ONE POLYOL SELECTED FROM THE GROUP CONSISTING OF A POLYETHER POLYOL, A MIXTURE OF A MAJOR AMOUNT OF A POLYETHER POLYOL AND A MINOR AMOUNT OF A POLYESTER POLYOL AND A POLYETHERESTER POLYOL HAVING A MAJOR AMOUNT OF ETHER LINKAGE AS COMPARED TO ESTER LINKAGES AND CONTAINING AT LEAST TWO ACTIVE HYDROXYL RADICALS IN AMOUNT SUFFICIENT TO FORM A POLYURETHANE IN ADMIXING WITH (3) A MINOR AMOUNT BY WEIGHT, BSED ON THE TOTAL WEIGHT OF POLYOL PRESENT AND SUFFICIENT TO CATALYZE THE REACTION BETWEEN SAID POLYISOCYANATE AND SAID POLYOL AND TO PREVENT DRY HEAT DEGRADATION OF THE RESULTING POLYURETHANE, OF AN AROMATIC TIN CATALYST SELECTED FROM AT LEAST ONE CATALYST OF THE GROUP HAVING THE FORMULAE:
Claim 2
Independent Claim
131 words
THE METHOD WHICH COMPRISES REACTING (1) AT LEAST ONE ORGANIC POLYISOCYANATE WITH (2) AT LEAST ONE POLYOL SELECTED FROM THE GROUP CONSISTING OF A POLYETHER POLYOL, A MIXTURE OF A MAJOR AMOUNT OF A POLYETHER POLYOL AND A MINOR AMOUNT OF A POLYESTER POLYOL AND A POLYETHERESTER POLYOL HAVING A MAJOR AMOUNT OF ETHER LINKAGE AS COMPARED TO ESTER LINKAGES AND CONTAINING AT LEAST TWO ACTIVE HYDROXYL RADICALS IN AMOUNT SUFFICIENT TO FORM A POLYURETHANE IN ADMIXING WITH (3) A MINOR AMOUNT BY WEIGHT, BSED ON THE TOTAL WEIGHT OF POLYOL PRESENT AND SUFFICIENT TO CATALYZE THE REACTION BETWEEN SAID POLYISOCYANATE AND SAID POLYOL AND TO PREVENT DRY HEAT DEGRADATION OF THE RESULTING POLYURETHANE, OF AN AROMATIC TIN CATALYST SELECTED FROM AT LEAST ONE CATALYST OF THE GROUP HAVING THE FORMULAE:
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) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |