Patent US4829451A successfully refreshed from Google Patents.
Patent US2947733A successfully refreshed from Google Patents.
US2947733A
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Process of curing a rubbery copolymer of a conjugated diene and a carboxylic acid oranhydride with dicyandiamide, and cured product obtained thereby
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
- 👤 Byron H Werner
- 👤 Robert J Reid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:34
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/315; C08K5/3155
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
THE PROCESS OF CURING AN ELASTOMER WHICH IS AN ELASTOMERIC COPOLYMER OF MONOMERS COMPRISING A CONJUGATED DIENE AND AN OLEFINICALLY UNSATURATED MONOMER FROM THE CLASS CONSISTING OF CARBOXYLIC ACIDS AND CARBOXYLIC ACID ANHYDRIDES WHICH CONTAINS FROM 0.03 TO 0.4 CHEMICAL EQUIVALENT BY WEIGHT F CARBOXYL GROUPS OF THE CLASS CONSISTING OF FREE AND ANHYDRIDE CARBOXYL GROUPS PER 100 PARTS OF THE COMBINED WEIGHT OF SAID DIENE AND OLEFINICALLY UNSATURATED MONOMER (CALCULATED AS COOH), WHICH PROCESS COMPRISES MIXING THE SAME WITH A SMALL AMOUNT OF DICYANDIAMIDE IN FINELY DIVIDED FROM AND THEN CURING BY HEATING TO A TEMPERATURE OF 140 TO 185* C.
Claim 2
Dependent Claim
102 words
THE PROCESS OF CURING AN ELASTOMER WHICH IS AN ELASTOMERIC COPOLYMER OF MONOMERS COMPRISING A CONJUGATED DIENE AND AN OLEFINICALLY UNSATURATED MONOMER FROM THE CLASS CONSISTING OF CARBOXYLIC ACIDS AND CARBOXYLIC ACID ANHYDRIDES WHICH CONTAINS FROM 0.03 TO 0.4 CHEMICAL EQUIVALENT BY WEIGHT F CARBOXYL GROUPS OF THE CLASS CONSISTING OF FREE AND ANHYDRIDE CARBOXYL GROUPS PER 100 PARTS OF THE COMBINED WEIGHT OF SAID DIENE AND OLEFINICALLY UNSATURATED MONOMER (CALCULATED AS COOH), WHICH PROCESS COMPRISES MIXING THE SAME WITH A SMALL AMOUNT OF DICYANDIAMIDE IN FINELY DIVIDED FROM AND THEN CURING BY HEATING TO A TEMPERATURE OF 140 TO 185* C.
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) | 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 |