Patent US3148167A successfully refreshed from Google Patents.
US3148167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane composition containing an epoxy compound
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1958-11-14
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Granted: 1964-09-08
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Expires: 1978-11-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Orin C Keplinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:49
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/83; C08G18/86; C08G18/28; C08G18/40; C08G18/58; C08L; C08L75/00; C08L75/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A POLYURETHANE COMPOSITION CURABLE TO A RUBBER WHICH IS CHARACTERIZED BY HAVING IMPROVED RESISTANCE TO HEAT WHEN HEATED IN THE ABSENCE OF AIR AND WHEN IMMERSED IN OIL, SAID COMPOSITION COMPRISING (1) A RUBBERY REACTION PRODUCT OF 0.95 TO 2 EQUIVALENT WEIGHTS OF AN ORGANIC DIISOCYANATE WITH ONE EQUIVALENT WEIGHT OF A LINEAR POLYOL HAVING A MOLECULAR WEIGHT OF AT LEAST 500 AND SELECTED FROM THE GROUP CONSISTING OF POLYALKYLENEETHER GLYCOLS AND POLYESTER GLYCOLS AND (2) 0.25 TO 20 PARTS BY WEIGHT PER 100 PARTS OF SAID REACTION PRODUCT OF AN ORGANIC EXPOY COMPOUND HAVING 3 TO 45 CARBON ATOMS, AT LEAST ONE EPOXY GROUP AND NO OTHER GROUP REACTIVE WITH SAID POLYOL AND SAID DIISOCYANATE.
Claim 2
Dependent Claim
116 words
A POLYURETHANE COMPOSITION CURABLE TO A RUBBER WHICH IS CHARACTERIZED BY HAVING IMPROVED RESISTANCE TO HEAT WHEN HEATED IN THE ABSENCE OF AIR AND WHEN IMMERSED IN OIL, SAID COMPOSITION COMPRISING (1) A RUBBERY REACTION PRODUCT OF 0.95 TO 2 EQUIVALENT WEIGHTS OF AN ORGANIC DIISOCYANATE WITH ONE EQUIVALENT WEIGHT OF A LINEAR POLYOL HAVING A MOLECULAR WEIGHT OF AT LEAST 500 AND SELECTED FROM THE GROUP CONSISTING OF POLYALKYLENEETHER GLYCOLS AND POLYESTER GLYCOLS AND (2) 0.25 TO 20 PARTS BY WEIGHT PER 100 PARTS OF SAID REACTION PRODUCT OF AN ORGANIC EXPOY COMPOUND HAVING 3 TO 45 CARBON ATOMS, AT LEAST ONE EPOXY GROUP AND NO OTHER GROUP REACTIVE WITH SAID POLYOL AND SAID DIISOCYANATE.
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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 |