Patent US2880185A successfully refreshed from Google Patents.
US2880185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blends of rubbery materials with resinous styrene-butadiene copolymers
Assignee: Imperial Chemical Industries Ltd
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Filing: 1955-12-05
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Granted: 1959-03-31
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Expires: 1975-12-05
Abstract
No abstract record available.
Inventors
- 👤 Lee Geoffrey Philip
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:37
CPC Classifications
C; C08; C08L; C08L9/00; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L25/10; C08L7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A COMPOSITION COMPRISING A MIXTURE OF (1) A RESINOUS COPOLYMER OBTAINED BY POLYMERIZING A MIXTURE HAVING AS THE ESSENTIAL COPOLYMERIZABLE MONOMERS BUTADIENE 1.3 AND STYRENE AND CONTAINING AT LEAST 70% BY WEIGHT OF STYRENE BASED ON THE WEIGHT OF THE MIXTURE OF MONOMERS, AND (2) A RUBBERY COPOLYMER OBTAINED BY POLYMERIZING A MIXTURE HAVING AS THE ESSENTIAL COPOLYMERIZABLE MONOMERS BUTADIENE 1.3 AND METHYL METHACRYLATE AND CONTAINING AT LEAST 60% BY WEIGHT OF BUTADIENE 1.3 BASED ON THE WEIGHT OF THE MIXTURE OF MONOMERS AND (3) NATURAL RUBBER, THERE BEING FOR EACH 100 PARTS BY WEIGHT OF NATURAL RUBBER IN THE MIXTURE FROM 20 TO 70 PARTS BY WEIGHT OF SAID RESINOUS COPOLYMER AND FOR EACH 100 PARTS BY WEIGHT OF SAID RESINOUS COPOLYMER FROM 25 TO 150 PARTS OF SAID RUBBERY COPOLYMER.
Claim 2
Dependent Claim
132 words
A COMPOSITION COMPRISING A MIXTURE OF (1) A RESINOUS COPOLYMER OBTAINED BY POLYMERIZING A MIXTURE HAVING AS THE ESSENTIAL COPOLYMERIZABLE MONOMERS BUTADIENE 1.3 AND STYRENE AND CONTAINING AT LEAST 70% BY WEIGHT OF STYRENE BASED ON THE WEIGHT OF THE MIXTURE OF MONOMERS, AND (2) A RUBBERY COPOLYMER OBTAINED BY POLYMERIZING A MIXTURE HAVING AS THE ESSENTIAL COPOLYMERIZABLE MONOMERS BUTADIENE 1.3 AND METHYL METHACRYLATE AND CONTAINING AT LEAST 60% BY WEIGHT OF BUTADIENE 1.3 BASED ON THE WEIGHT OF THE MIXTURE OF MONOMERS AND (3) NATURAL RUBBER, THERE BEING FOR EACH 100 PARTS BY WEIGHT OF NATURAL RUBBER IN THE MIXTURE FROM 20 TO 70 PARTS BY WEIGHT OF SAID RESINOUS COPOLYMER AND FOR EACH 100 PARTS BY WEIGHT OF SAID RESINOUS COPOLYMER FROM 25 TO 150 PARTS OF SAID RUBBERY COPOLYMER.
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) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |