US2947338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxide cure of rubbery copolymer which contains a reactive carboxyl group
Assignee: Bridgestone Firestone Inc
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Filing: 1957-04-19
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Granted: 1960-08-02
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Expires: 1977-04-19
Abstract
No abstract record available.
Inventors
- 👤 Robert J Reid
- 👤 Byron H Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:39
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/30; C08C19/34; C08C19/36; B; B60; B60C; B60C1/00; C08L; C08L63/00; Y; Y10; Y10S; Y10S152/00; Y10S152/905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
THE METHOD OF CURING AN ELASTOMER WHICH CONTAINS FROM 0.03 TO 0.4 CHEMICAL EQUIVALENT BY WEIGHT OF FREE AND ANHYDRIDE CARBOXYL GROUPS (ALL CALCULATED AS -COOH) PER 100 PARTS BY WEIGHT OF ELASTOMER, IN WHICH THE ELASTOMER IS A COPOLYMER OF A CONJUGATED DIENE AND AN OIEFINICALLY UNSATURATED MONOMER FROM THE CLASS CONSISTING OF CARBOXYLIC ACIDS AND CARBOXYLIC ACID ANHYDRIDES, WHICH METHOD COMPRISES HEATING THE ELASTOMER ADMIXED WITH A POLYEPOXIDE IN WHICH THE EPOXY OXYGEN GROUP IS UNITED TO TWO CARBON ATOMS WHICH ARE ADJACENT TO ONE ANOTHER, THE TEMPERATURE AND TIME OF HEATING BEING EQUIVALENT TO 90 TO 20 MINUTES AT 250 AND 350*F.
Claim 2
Independent Claim
105 words
THE METHOD OF CURING AN ELASTOMER WHICH CONTAINS FROM 0.03 TO 0.4 CHEMICAL EQUIVALENT BY WEIGHT OF FREE AND ANHYDRIDE CARBOXYL GROUPS (ALL CALCULATED AS -COOH) PER 100 PARTS BY WEIGHT OF ELASTOMER, IN WHICH THE ELASTOMER IS A COPOLYMER OF A CONJUGATED DIENE AND AN OIEFINICALLY UNSATURATED MONOMER FROM THE CLASS CONSISTING OF CARBOXYLIC ACIDS AND CARBOXYLIC ACID ANHYDRIDES, WHICH METHOD COMPRISES HEATING THE ELASTOMER ADMIXED WITH A POLYEPOXIDE IN WHICH THE EPOXY OXYGEN GROUP IS UNITED TO TWO CARBON ATOMS WHICH ARE ADJACENT TO ONE ANOTHER, THE TEMPERATURE AND TIME OF HEATING BEING EQUIVALENT TO 90 TO 20 MINUTES AT 250 AND 350*F.
References Cited (Backward Citations)
US2604464A
Cited
GB736457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |