Patent US2991270A successfully refreshed from Google Patents.
US2991270A
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US
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Plastic composition comprising a blend of an elastomer and a certain ternary copolymer and method of making same
Assignee: Shell USA Inc
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Filing: 1957-04-12
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Granted: 1961-07-04
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Expires: 1977-04-12
Abstract
No abstract record available.
Inventors
- 👤 Roper Alec Norman
- 👤 Seijo Ernest
- 👤 Barb Wolfgang Gersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:15
CPC Classifications
C; C08; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L25/12; C08L25/14; C08L25/16; C08L9/00; C08L9/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A PLASTIC COMPOSITION CONSISTING OF A BLEND OF 10 TO 40 PARTS OF A RUBBERY COPOLYMER OF A CONJUGATED DIOLEFIN AND ACRYLONITRILE WITH 60 TO 90 PARTS OF A TERNARY COPOLYMER OF (A) 50% TO 90% BY WEIGHT OF AN ALKENYLSUBSTITUTED AROMATIC COMPOUND OF THE GROUP CONSISTING OF STYRENE, ALPHA-METHYL STYRENE, VINYLNAPHTHALENE, DIMETHYLSTYRENE, VINYL TOLUENE, AND 3,4-DIMETHYLSTYRENE, (B) 15% TO 25% BY WEIGHT OF AN ALPHA, BETA-ETHYLENICALLY UNSATURATED NITRILE OF THE FORMULA
Claim 2
Dependent Claim
72 words
A PLASTIC COMPOSITION CONSISTING OF A BLEND OF 10 TO 40 PARTS OF A RUBBERY COPOLYMER OF A CONJUGATED DIOLEFIN AND ACRYLONITRILE WITH 60 TO 90 PARTS OF A TERNARY COPOLYMER OF (A) 50% TO 90% BY WEIGHT OF AN ALKENYLSUBSTITUTED AROMATIC COMPOUND OF THE GROUP CONSISTING OF STYRENE, ALPHA-METHYL STYRENE, VINYLNAPHTHALENE, DIMETHYLSTYRENE, VINYL TOLUENE, AND 3,4-DIMETHYLSTYRENE, (B) 15% TO 25% BY WEIGHT OF AN ALPHA, BETA-ETHYLENICALLY UNSATURATED NITRILE OF THE FORMULA
References Cited (Backward Citations)
US2614093A
Cited
US2807603A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |