US3520847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized acrylonitrile polymer
Assignee: Chemische Werke Buna VEB
•
Filing: 1966-12-01
•
Granted: 1970-07-21
•
Expires: 1986-12-01
Abstract
No abstract record available.
Inventors
- 👤 Jurgen Runge
- 👤 Wally Nelles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:01
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3415
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2911387A
Cited
US2841569A
Cited
US2897208A
Cited
US3105059A
Cited
US3344096A
Cited
US3256237A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-20 | 1974-01-19 | 1974-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-20 | 1978-01-19 | 1978-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-20 | 1982-01-19 | 1982-07-21 | $7700.00 | Window Closed / Lapsed |