Patent US2653966A successfully refreshed from Google Patents.
US2653966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of acrylonitrile
Assignee: Monsanto Chemicals Ltd
•
Filing: 1951-07-20
•
Granted: 1953-09-29
•
Expires: 1971-07-20
Abstract
No abstract record available.
Inventors
- 👤 Keith M Taylor
- 👤 Harry M Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:24
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/32; C07C253/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
THE METHOD PURIFYING MONOMERIC ACRYLONITRILE TO REMOVE HYDROGEN CYANIDE THEREFROM WHICH COMPRISES CONTACTING THE SAID ACRYLONITRILE WITH FROM 0.0001% TO 0.3% BY WEIGHT OF A BASIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKALI AND ALKALINE EARTHY HYDROXIDES, OXIDES, CARBONATES AND CYANIDES, AND THEREAFTER SEPARATING THE PURIFIED ACRYLONITRILE.
Claim 2
Independent Claim
48 words
THE METHOD PURIFYING MONOMERIC ACRYLONITRILE TO REMOVE HYDROGEN CYANIDE THEREFROM WHICH COMPRISES CONTACTING THE SAID ACRYLONITRILE WITH FROM 0.0001% TO 0.3% BY WEIGHT OF A BASIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKALI AND ALKALINE EARTHY HYDROXIDES, OXIDES, CARBONATES AND CYANIDES, AND THEREAFTER SEPARATING THE PURIFIED ACRYLONITRILE.
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) | 1956-09-28 | 1957-03-30 | 1957-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-28 | 1961-03-30 | 1961-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-28 | 1965-03-30 | 1965-09-29 | $7700.00 | Window Closed / Lapsed |