US3085991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of polyurethanes
Assignee: Goodyear Tire and Rubber Co
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Filing: 1959-12-22
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Granted: 1963-04-16
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Expires: 1979-12-22
Abstract
No abstract record available.
Inventors
- 👤 Anthony F Finelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:15
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/2805; C08G18/2815; C08K; C08K5/00; C08K5/04; C08K5/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
IN A PROCESS FOR PREPARING MILLABLE POLYURETHANE ELASTOMERS (1) BY FORMING A REACTION MIXTURE OF A REACTIVE HYDROGEN CONTAINING COMPOUND OF ABOUT 700 TO 6000 MOLECULAR WEIGHT SELECTED FROM THE CLASS CONSISTING OF POLYESTER GLYCOLS AND POLYETHER GLYCOLS, WITH ESSENTIALLY AN EQUIVALENT MOLAR AMOUNT OF AN ORGANIC DIISOCYANATE AND THEN REACTING AND CURING SAID MIXTURE PER SE TO OBTAIN A MILLABLE ELASTOMER, THE IMPROVEMENTT COMPRISING ADDING TO SAID REACTION MIXTURE ON A 100 PARTS OF REACTIVE HYDROGEN CONTAINING COMPOUND BASIS AT LEAST 0.1 TO 3 PARTS OF A SUBSTITUTED PHENOL HAVING AN IONIZATION CONSTANT OF AT LEAST 1X10-**10 AND NO GREATER THAN 1X10-**5 BEFORE THE REACTION MIXTURE IS REACTED AND CURED TO STABILIZE THE CURED ELASTOMER IN THE MILLABLE STATE FOR AN EXTENDED TIME.
Claim 2
Dependent Claim
124 words
IN A PROCESS FOR PREPARING MILLABLE POLYURETHANE ELASTOMERS (1) BY FORMING A REACTION MIXTURE OF A REACTIVE HYDROGEN CONTAINING COMPOUND OF ABOUT 700 TO 6000 MOLECULAR WEIGHT SELECTED FROM THE CLASS CONSISTING OF POLYESTER GLYCOLS AND POLYETHER GLYCOLS, WITH ESSENTIALLY AN EQUIVALENT MOLAR AMOUNT OF AN ORGANIC DIISOCYANATE AND THEN REACTING AND CURING SAID MIXTURE PER SE TO OBTAIN A MILLABLE ELASTOMER, THE IMPROVEMENTT COMPRISING ADDING TO SAID REACTION MIXTURE ON A 100 PARTS OF REACTIVE HYDROGEN CONTAINING COMPOUND BASIS AT LEAST 0.1 TO 3 PARTS OF A SUBSTITUTED PHENOL HAVING AN IONIZATION CONSTANT OF AT LEAST 1X10-**10 AND NO GREATER THAN 1X10-**5 BEFORE THE REACTION MIXTURE IS REACTED AND CURED TO STABILIZE THE CURED ELASTOMER IN THE MILLABLE STATE FOR AN EXTENDED TIME.
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) | 1966-04-15 | 1966-10-15 | 1967-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-15 | 1970-10-15 | 1971-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-15 | 1974-10-15 | 1975-04-16 | $7700.00 | Window Closed / Lapsed |