US3012984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane composition prepared by reacting epoxide resin polyester and trimethylol propane diisocyanate reaction product in solvent therefor
Assignee: Bayer Corp
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Filing: 1958-08-14
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Granted: 1961-12-12
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Expires: 1978-08-14
Abstract
No abstract record available.
Inventors
- 👤 George A Hudson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:48
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/58; C08G18/4009; C08G18/4045; C08G18/70; C08G18/72; C08G18/80; C08G18/8003; C08G18/8006; C08G18/8009; C08G18/8022; C08G18/8029
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A POLYURETHANE COATING COMPOSITION WHICH IS PREPARED BY REACTING AN EPOXIDE RESIN OBTAINED BY A PROCESS WHICH COMPRISES CONDENSING A MIXTURE CONSISTING ESSENTIALLY OF AN EPIHALOGENOHYDRIN AND A DIHYDRIC PHENOL, SAID EPOXIDE RESIN HAVING A MOLECULAR WEIGHT FROM ABOUT 384 TO ABOUT 4000 AND AN HYDROXYL TERMINATED POLYESTER OBTAINED BY A PROCESS WHICH COMPRISES ESTERIFICATION OF A POLYCARBOXYLIC ACID WITH A POLYHYDRIC ALCOHOL HAVING AN HYDROXYL NUMBER OF FROM ABOUT 150 TO ABOUT 300 WITH LESS THAN ENOUGH ORGANIC POLYISOCYANATE, SAID ORGANIC POLYISOCYANATE BEING THE -NCO TERMINATED REACTION PRODUCT OF TRIMETHYLOL PROPANE AND TOLYLENE DIISOCYANATE, TO REACT WITH ALL THE AVAILABLE -OH GROUPS PRESENT, IN THE PRESENCE OF A SUITABLE INERT ORGANIC SOLVENT THEREFOR.
Claim 2
Dependent Claim
114 words
A POLYURETHANE COATING COMPOSITION WHICH IS PREPARED BY REACTING AN EPOXIDE RESIN OBTAINED BY A PROCESS WHICH COMPRISES CONDENSING A MIXTURE CONSISTING ESSENTIALLY OF AN EPIHALOGENOHYDRIN AND A DIHYDRIC PHENOL, SAID EPOXIDE RESIN HAVING A MOLECULAR WEIGHT FROM ABOUT 384 TO ABOUT 4000 AND AN HYDROXYL TERMINATED POLYESTER OBTAINED BY A PROCESS WHICH COMPRISES ESTERIFICATION OF A POLYCARBOXYLIC ACID WITH A POLYHYDRIC ALCOHOL HAVING AN HYDROXYL NUMBER OF FROM ABOUT 150 TO ABOUT 300 WITH LESS THAN ENOUGH ORGANIC POLYISOCYANATE, SAID ORGANIC POLYISOCYANATE BEING THE -NCO TERMINATED REACTION PRODUCT OF TRIMETHYLOL PROPANE AND TOLYLENE DIISOCYANATE, TO REACT WITH ALL THE AVAILABLE -OH GROUPS PRESENT, IN THE PRESENCE OF A SUITABLE INERT ORGANIC SOLVENT THEREFOR.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |