Patent US2638462A successfully refreshed from Google Patents.
US2638462A
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US
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Compositions comprising blends of rubbery and resinous butadienestyrene copolymers
Assignee: Wingfoot Corp
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Filing: 1945-10-02
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Granted: 1953-05-12
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Expires: 1965-10-02
Abstract
No abstract record available.
Inventors
- 👤 Alvin M Borders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:49
CPC Classifications
C; C08; C08L; C08L9/00; C08L9/06; C08L21/00; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L25/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
87 words
AN UNVULCANIZED VULCANIZABLE COMPOSITION OF MATTER COMPRISING 90-50 PARTS OF A RUBBERY COPOLYMER OF A MAJOR PROPORTION OF BUTADIENE OF A MINOR PROPORTION OF STYRENE IN ADMIXTURE WITH 10-50 PARTS OF A HARD, THERMOPLASTIC RESIN OBTAINED BY COPOLYMERIZING A MIXTURE OF 70-95 WEIGHT PERCENT OF STYRENE AND 30-5 WEIGHT PERCENT OF BUTADIENE IN AQUEOUS EMULSION IN THE PRESENCE OF A SUBSTANCE WHICH PROMOTES THE SOLUBILITY OF THE RESULTING RESIN IN BENZENE AND SELECTED FROM THE GROUP CONSISTING OF MERCAPTANS CONTAINING AT LEAST 6 CARBON ATOMS, DIALKYL POLY-
References Cited (Backward Citations)
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US2393208A
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US2414803A
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US2419202A
Cited
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US2477316A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-11 | 1956-11-10 | 1957-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-11 | 1960-11-10 | 1961-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-11 | 1964-11-10 | 1965-05-12 | $7700.00 | Window Closed / Lapsed |