US3936360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for distillation and recovery of olefinic nitriles
Assignee: Standard Oil Co
•
Filing: 1973-02-09
•
Granted: 1976-02-03
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Expires: 1993-02-09
Abstract
Abstract Substantial capital and operating cost savings and improved recovery of acrylonitrile and methacrylonitrile are realized by the recycle of the product column bottoms to the quench liquid of the reactor effluent quench system.
Inventors
- 👤 Hsin Chih Wu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:05
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/32; C07C253/34; Y; Y10; Y10S; Y10S203/00; Y10S203/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3328266A
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US3201918A
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US3328268A
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US3329582A
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US3247237A
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US3462477A
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US3352764A
Cited
US3535849A
Cited
US3636067A
Cited
US3636068A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-02 | 1979-08-04 | 1980-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-02 | 1983-08-04 | 1984-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-02 | 1987-08-04 | 1988-02-03 | $7700.00 | Window Closed / Lapsed |