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US3535849A
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US
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Process for the separation of acrylonitrile and acetonitrile by absorption,extractive distillation and solvent stripping
Assignee: Bayer AG
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Filing: 1968-06-24
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Granted: 1970-10-27
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Expires: 1988-06-24
Abstract
No abstract record available.
Inventors
- 👤 Arnold Hausweiler
- 👤 Feliks Bitners
- 👤 Karl-Heinrich Knapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:11
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/32; C07C253/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA638617A
Cited
US2526676A
Cited
US3201918A
Cited
US3210399A
Cited
US3305308A
Cited
US3262963A
Cited
US3352764A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-26 | 1974-04-27 | 1974-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-26 | 1978-04-27 | 1978-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-26 | 1982-04-27 | 1982-10-27 | $7700.00 | Window Closed / Lapsed |