US3649716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blends of styrene/acrylonitrile copolymers with block copolymers containing lactones
Assignee: Phillips Petroleum Co
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Filing: 1970-04-17
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Granted: 1972-03-14
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Expires: 1990-04-17
Abstract
Abstract THE IMPACT STRENGTH OF STYRENE/ACRYLONITRILE COPOLYMERS IS GREATLY IMPROVED BY BLENDING THERWITH A CONJUGATED DIENE BLOCK COPOLYMER CONTAINING A LACTONE.
Inventors
- 👤 Clifford W Childers
- 👤 Earl Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:34
CPC Classifications
C; C08; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L25/12; C08G; C08G63/00; C08G63/02; C08G63/06; C08G63/08; C08L53/00; C08L67/00; C08L67/04; Y; Y10; Y10S; Y10S525/00; Y10S525/932
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |