US2958671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions of polymeric alkenyl aromatic hydrocarbons and monovinyl aromatic hydrocarbon-butadiene copolymers
Assignee: Dow Chemical Co
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Filing: 1954-10-04
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Granted: 1960-11-01
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Expires: 1974-10-04
Abstract
No abstract record available.
Inventors
- 👤 Keskkula Henno
- 👤 Raymond M Price
- 👤 Arthur F Roche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:58
CPC Classifications
C; C08; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L25/10; C08L25/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A COMPOSITION OF MATTER COMPRISING FROM 55 TO 70 PERCENT BY WEIGHT OF AT LEAST ONE THERMOPLASTIC POLYMER WHICH IS A MEMBER OF THE GROUP CONSISTING OF POLYMERIZED MONOVINYL AROMATIC HYDROCARBONS OF THE BENZENE SERIES HAVING THE VINYL RADICAL DIRECTLY ATTACHED TO A CARBON ATOM OF THE AROMATIC NUCLEUS AND COPOLYMERS OF AT LEAST 60 PERCENT BY WEIGHT OF AT LEAST ONE SUCH MONOVINYL AROMATIC HYDROCARBON AND NOT MORE THAN 40 PERCENT BY WEIGHT OF AN ALKENYL AROMATIC HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF ALPHA-METHYLSTYRENE AND PARAMETHYL-ALPHA-METHYLSTYRENE, AND FROM 45 TO 30 PERCENT BY WEIGHT OF A COPOLYMER CONTAINING IN CHEMICALLY COMBINED FORM FROM 42 TO 50 PERCENT BY WEIGHT OF BUTADIENE1,3 AND FROM 58 TO 50 PERCENT BY WEIGHT OF A MONOVINYL AROMATIC HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF STYRENE AND VINYLTOLUENE, SAID BUTADIENE COPOLYMER HAVING A GEL CONTENT BETWEEN 70 TO 95 PERCENT BY WEIGHT OF THE COPOLYMER AS DETERMINED IN TOLUENE AT 25*C.
Claim 2
Dependent Claim
158 words
A COMPOSITION OF MATTER COMPRISING FROM 55 TO 70 PERCENT BY WEIGHT OF AT LEAST ONE THERMOPLASTIC POLYMER WHICH IS A MEMBER OF THE GROUP CONSISTING OF POLYMERIZED MONOVINYL AROMATIC HYDROCARBONS OF THE BENZENE SERIES HAVING THE VINYL RADICAL DIRECTLY ATTACHED TO A CARBON ATOM OF THE AROMATIC NUCLEUS AND COPOLYMERS OF AT LEAST 60 PERCENT BY WEIGHT OF AT LEAST ONE SUCH MONOVINYL AROMATIC HYDROCARBON AND NOT MORE THAN 40 PERCENT BY WEIGHT OF AN ALKENYL AROMATIC HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF ALPHA-METHYLSTYRENE AND PARAMETHYL-ALPHA-METHYLSTYRENE, AND FROM 45 TO 30 PERCENT BY WEIGHT OF A COPOLYMER CONTAINING IN CHEMICALLY COMBINED FORM FROM 42 TO 50 PERCENT BY WEIGHT OF BUTADIENE1,3 AND FROM 58 TO 50 PERCENT BY WEIGHT OF A MONOVINYL AROMATIC HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF STYRENE AND VINYLTOLUENE, SAID BUTADIENE COPOLYMER HAVING A GEL CONTENT BETWEEN 70 TO 95 PERCENT BY WEIGHT OF THE COPOLYMER AS DETERMINED IN TOLUENE AT 25*C.
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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) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |