US3453223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of acrylonitrile graft copolymers
Assignee: Bayer AG
•
Filing: 1964-08-24
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Granted: 1969-07-01
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Expires: 1984-08-24
Abstract
No abstract record available.
Inventors
- 👤 Carlhans Suling
- 👤 Egon Kuntz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:49
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/728; C08F; C08F220/00; C08F220/02; C08F220/42; C08F220/44; C08F291/00; C08F291/06; C08F291/08
Claims Analysis
Total Claims: 0
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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) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |