Patent US3331791A successfully refreshed from Google Patents.
US3331791A
Expired / Lapsed
US
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Polyurethane foams produced from monoamine triols
Assignee: Texaco Inc
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Filing: 1963-11-04
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Granted: 1967-07-18
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Expires: 1983-11-04
Abstract
No abstract record available.
Inventors
- 👤 Cuscurida Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:34
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
IN THE PREPARATION OF FLEXIBLE POLYURETHANE FOAM BY THE REACTION OF AN ORGANIC DIISOCYANATE WITH A TRIOL IN THE PRESENCE OF A BLOWING AGENT AND A FOAM STABILIZING AGENT, THE IMPROVEMENT WHICH COMPRISES REPLACING FROM ABOUT 5 TO ABOUT 40 WT. PERCENT OF SAID TRIOL WITH A MONOAMINE, SAID TRIOL HAVING A MOLECULAR WEIGHT WITHIN THE RANGE OF FROM ABOUT 2,500 TO ABOUT 4,000 AND HAVING BEEN PREPARED BY REACTING AN ALCOHOL INITIATOR CONTAINING AN AVERAGE OF ABOUT THREE ACTIVE HYDROGEN ATOMS WITH FROM ABOUT 80 TO ABOUT 100 WT. PERCENT OF PROPYLENE OXIDE AND, CORRESPONDINGLY, FROM ABOUT 20 TO ABOUT 0 WT. PERCENT OF ETHYLENE OXIDE, SAID MONOAMINE HAVING THE FORMULA:
Claim 2
Dependent Claim
112 words
IN THE PREPARATION OF FLEXIBLE POLYURETHANE FOAM BY THE REACTION OF AN ORGANIC DIISOCYANATE WITH A TRIOL IN THE PRESENCE OF A BLOWING AGENT AND A FOAM STABILIZING AGENT, THE IMPROVEMENT WHICH COMPRISES REPLACING FROM ABOUT 5 TO ABOUT 40 WT. PERCENT OF SAID TRIOL WITH A MONOAMINE, SAID TRIOL HAVING A MOLECULAR WEIGHT WITHIN THE RANGE OF FROM ABOUT 2,500 TO ABOUT 4,000 AND HAVING BEEN PREPARED BY REACTING AN ALCOHOL INITIATOR CONTAINING AN AVERAGE OF ABOUT THREE ACTIVE HYDROGEN ATOMS WITH FROM ABOUT 80 TO ABOUT 100 WT. PERCENT OF PROPYLENE OXIDE AND, CORRESPONDINGLY, FROM ABOUT 20 TO ABOUT 0 WT. PERCENT OF ETHYLENE OXIDE, SAID MONOAMINE HAVING THE FORMULA:
References Cited (Backward Citations)
US3042631A
Cited
US3194773A
Cited
US3094434A
Cited
GB868996A
Cited
US3110732A
Cited
US3231619A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |