US3663471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic molding compositions and moldings of polycarbonates admixed with a graft copolymer
Assignee: Bayer AG
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Filing: 1970-01-02
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Granted: 1972-05-16
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Expires: 1990-01-02
Abstract
Abstract THE INVENTION RELATES TO THERMOPLASTIC MOULDING COMPOSITIONS AND MOULDINGS OF POLYCARBONATES OF DIHYDRIC PHENOLS HAVING IMPROVED PROPERTIES CONTAINING PARTICULAR AMOUNTS OF PARTICULAR GRAFT POLYMERS ADMIXED TO THE POLYCARBONATES. THE PARTICULAR GRAFT POLYMERS ARE MANUFACTURED FROM ABOUT 50 TO ABOUT 90% BY WEIGHT OF POLYBUTADIENE AND A MIXTURE OF ABOUT 5 TO ABOUT 40% BY WEIGHT OF ACRYLONITRILE AND ABOUT 5 TO ABOUT 45% BY WEIGHT OF AN AROMATIC VINYL HYDROCARBON, SUCH AS STYRENE, AND SAID GRAFT POLYMERS ARE PRESNET IN AN AMOUNT OF ABOUT 0.5 TO ABOUT 9.5 PARTS BY WEIGHT FOR ABOUT 99.5 TO ABOUT 90.5 PARTS BY WEIGHT OF POLYCARBONATE.
Inventors
- 👤 Hermann Schirmer
- 👤 Gunter Peilstocker
- 👤 Hugo Vernaleken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:43
CPC Classifications
C; C08; C08L; C08L69/00; C08F; C08F279/00; C08F279/02; C08F279/04; C08L69/005
Claims Analysis
Total Claims: 0
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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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |