US2793227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of cyanide impurities from acrylonitrile
Assignee: Honeywell International Inc
•
Filing: 1955-07-14
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Granted: 1957-05-21
•
Expires: 1975-07-14
Abstract
No abstract record available.
Inventors
- 👤 Sadle Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:46
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/32; C07C253/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
IN THE PROCESS OF PURIFYING ACRYLONITRILE, THE STEPS COMPRISING TREATING THE ACRYLONITRILE WITH A 1-5% CAUSTIC SOLUTION, SUBSEQUENTLY FLASH DISTILLING THE SO-TREATED PRODUCT TO REMOVE LACTONITRILE AND THEN FRACTIONALLY DISTILLING THE ACRYLONITRILE TO REMOVE REMAINING CYANIDE IMPURITIES.
Claim 2
Dependent Claim
37 words
IN THE PROCESS OF PURIFYING ACRYLONITRILE, THE STEPS COMPRISING TREATING THE ACRYLONITRILE WITH A 1-5% CAUSTIC SOLUTION, SUBSEQUENTLY FLASH DISTILLING THE SO-TREATED PRODUCT TO REMOVE LACTONITRILE AND THEN FRACTIONALLY DISTILLING THE ACRYLONITRILE TO REMOVE REMAINING CYANIDE IMPURITIES.
References Cited (Backward Citations)
US2653966A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-20 | 1960-11-19 | 1961-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-20 | 1964-11-19 | 1965-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-20 | 1968-11-19 | 1969-05-21 | $7700.00 | Window Closed / Lapsed |