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Patent US2957832A successfully refreshed from Google Patents.
US2957832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellular polyurethane elastomer and preparation of same using pyridine catalyst
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1956-12-05
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Granted: 1960-10-25
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Expires: 1976-12-05
Abstract
No abstract record available.
Inventors
- 👤 George T Gmitter
- 👤 Edwin M Maxey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:51
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/20; C08G18/2009; C08G18/2018; Y; Y10; Y10S; Y10S521/00; Y10S521/918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
IN THE METHOD OF MAKING A POLYURETHANE FOAMED MATERIAL WHEREIN POLYURETHANE FORMING REACTANTS COMPRISING (1) A HYDROXY TERMINATED POLYOL HAVING A MOLECULAR WEIGHT OF AT LEAST 500 AND BEING SELECTED FROM THE GROUP CONSISTING OF A POLYALKYLENE ETHER GLYCOL AND A POLYESTER HAVING AN ACID NUMBER LESS THAN 10 AND BEING THE REACTION PRODUCT OF A POLYCARBOXYLIC ACID AND A POLYHYDRIC ALCOHOL, (2) AN ORGANIC POLYISOCYANATE IN AN AMOUNT IN EXCESS OF THAT REQUIRED TO REACT WITH THE HYDROXYL END GROUPS OF SAID POLYOL, AND (3) WATER AS A BLOWING AGENT IN AN AMOUNT SUFFICIENT TO FORM A FOAMED POLYURETHANE ARE MIXED TO FORM A CELLULAR POLYURETHANE, THE IMPROVEMENT WHICH COMPRISES ADDITIONALLY MIXING WITH SAID POLYOL, POLYISCYANATE AND BLOWING AGENT FROM ABOUT 0.5 TO 5.0 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF SAID POLYOL AND SAID POLYISOCYANATE OF A CATALYST HAVING THE FORMULA
Claim 2
Dependent Claim
145 words
IN THE METHOD OF MAKING A POLYURETHANE FOAMED MATERIAL WHEREIN POLYURETHANE FORMING REACTANTS COMPRISING (1) A HYDROXY TERMINATED POLYOL HAVING A MOLECULAR WEIGHT OF AT LEAST 500 AND BEING SELECTED FROM THE GROUP CONSISTING OF A POLYALKYLENE ETHER GLYCOL AND A POLYESTER HAVING AN ACID NUMBER LESS THAN 10 AND BEING THE REACTION PRODUCT OF A POLYCARBOXYLIC ACID AND A POLYHYDRIC ALCOHOL, (2) AN ORGANIC POLYISOCYANATE IN AN AMOUNT IN EXCESS OF THAT REQUIRED TO REACT WITH THE HYDROXYL END GROUPS OF SAID POLYOL, AND (3) WATER AS A BLOWING AGENT IN AN AMOUNT SUFFICIENT TO FORM A FOAMED POLYURETHANE ARE MIXED TO FORM A CELLULAR POLYURETHANE, THE IMPROVEMENT WHICH COMPRISES ADDITIONALLY MIXING WITH SAID POLYOL, POLYISCYANATE AND BLOWING AGENT FROM ABOUT 0.5 TO 5.0 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF SAID POLYOL AND SAID POLYISOCYANATE OF A CATALYST HAVING THE FORMULA
References Cited (Backward Citations)
US1045234A
Cited
US2650212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |