US3634545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylonitrile graft polymers
Assignee: Bayer AG
•
Filing: 1969-08-14
•
Granted: 1972-01-11
•
Expires: 1989-08-14
Abstract
Abstract THE PRESENT INVENTION RELATED TO ACRYLONITRILE GRAFT POLYMERS CONTAINING AT LEAST 50% BY WEIGHT OF GRAFT POLYMERISED ACRYLONITRILE AND OPTIONALLY UP TO 10% BY WEIGHT OF ANOTHER GRAFT POLYMERISED ACRYLIC, METHACRYLIC, VINYL OR VINYLIDENE COMONOMER AND, AS GRAFT SUBSTRATE FROM 5 TO 40% BY WEIGHT OF A LINER POLYETHER CONTAINING TERTIARY NITROGEN ATOMS OR A DERIVATIVE THEREOF WHICH IS QUATERNIZED ON THE NITROGEN.
Inventors
- 👤 Helmut Engelhard
- 👤 Francis Bentz
- 👤 Wolfgang Giessler
- 👤 Gunther-Ernst Nischk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:54
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/06; Y; Y10; Y10S; Y10S8/00; Y10S8/18
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |