US3294868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polypropylene blended with butadienestyrene block copolymer
Assignee: Phillips Petroleum Co
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Filing: 1964-05-04
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Granted: 1966-12-27
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Expires: 1984-05-04
Abstract
No abstract record available.
Inventors
- 👤 James E Pritchard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:29
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/12; C08L53/00; C08L53/02; D; D02; D02G; D02G1/00; D02G1/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A BLEND OF POLYPROPYLENE AND A BLOCK COPOLYMER OF BUTADIENE AND STYRENE, SAID BLEND COMPRISING FROM 3 TO 35 WEIGHT PERCENT OF SAID BLOCK COPOLYMER AND THE REMAINDER CRYSTALLINE POLYPROPYLEN; SAID POLYPROPYLENE HAVING A DENSITY IN THE RANGE 0.900 TO 0.920, A FLEXURAL MODULUS IN THE RANGE 100,000 TO 250,000, AND A MELT FLOW IN THE RANGE 1 TO 15; SAID BLOCK COPOLYMER CONTAINING FROM 10 TO 30 WEIGHT PERCENT BOUND STYRENE, AT LEAST 80 PERCENT OF WHICH IS IN THE FORM OF A HOMOPOLYMERIC POLYSTYRENE BLOCK, AS DETERNINED BY OXIDATIVE DEGRADATION, AND AN INHERENT VISCOSITY IN THE RANGE 0.1 TO 2.
Claim 2
Dependent Claim
102 words
A BLEND OF POLYPROPYLENE AND A BLOCK COPOLYMER OF BUTADIENE AND STYRENE, SAID BLEND COMPRISING FROM 3 TO 35 WEIGHT PERCENT OF SAID BLOCK COPOLYMER AND THE REMAINDER CRYSTALLINE POLYPROPYLEN; SAID POLYPROPYLENE HAVING A DENSITY IN THE RANGE 0.900 TO 0.920, A FLEXURAL MODULUS IN THE RANGE 100,000 TO 250,000, AND A MELT FLOW IN THE RANGE 1 TO 15; SAID BLOCK COPOLYMER CONTAINING FROM 10 TO 30 WEIGHT PERCENT BOUND STYRENE, AT LEAST 80 PERCENT OF WHICH IS IN THE FORM OF A HOMOPOLYMERIC POLYSTYRENE BLOCK, AS DETERNINED BY OXIDATIVE DEGRADATION, AND AN INHERENT VISCOSITY IN THE RANGE 0.1 TO 2.
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) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |