US2798884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of acrylonitrile
Assignee: Wyeth Holdings LLC
•
Filing: 1955-12-19
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Granted: 1957-07-09
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Expires: 1975-12-19
Abstract
No abstract record available.
Inventors
- 👤 George L Christopher
- 👤 Erwin L Carpenter
- 👤 Marshall L Spector
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:11
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/08; C07C253/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
IN THE PREPARATION OF ACRYLONITRILE BY THE CATALYTIC REACTION OF HCN AND ACETYLENE IN THE PRESENCE OF A CATALYST COMPRISING CUPROUS CHLORIDE DISSOLVED IN A SOLVENT, THE IMPROVEMENT IN COMBINATION THEREWITH FOR ELIMINATING THE FORMATION OF ACETALDEHYDE WHILE MAINTAINING A SUBSTANTIALLY STABLE CATALYST ACTIVITY AND A HIGH YIELD OF ACRYLONITRILE WHICH COMPRISES: CONDUCTING THE REACTION IN AN ANHYDROUS CUPROUS CHLORIDE CATALYST SOLUTION COMPRISING A SOLVENT SELECTED FROM THE GROUP CONSISTING OF 2-PYRROLIDONE, 2-PIPERIDONE, CAPROLACTAM, AND THE N-METHYL AND N-ETHYL DERIVATIVES THEREOF.
Claim 2
Dependent Claim
81 words
IN THE PREPARATION OF ACRYLONITRILE BY THE CATALYTIC REACTION OF HCN AND ACETYLENE IN THE PRESENCE OF A CATALYST COMPRISING CUPROUS CHLORIDE DISSOLVED IN A SOLVENT, THE IMPROVEMENT IN COMBINATION THEREWITH FOR ELIMINATING THE FORMATION OF ACETALDEHYDE WHILE MAINTAINING A SUBSTANTIALLY STABLE CATALYST ACTIVITY AND A HIGH YIELD OF ACRYLONITRILE WHICH COMPRISES: CONDUCTING THE REACTION IN AN ANHYDROUS CUPROUS CHLORIDE CATALYST SOLUTION COMPRISING A SOLVENT SELECTED FROM THE GROUP CONSISTING OF 2-PYRROLIDONE, 2-PIPERIDONE, CAPROLACTAM, AND THE N-METHYL AND N-ETHYL DERIVATIVES THEREOF.
References Cited (Backward Citations)
US2698337A
Cited
US2715137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-08 | 1961-01-07 | 1961-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-08 | 1965-01-07 | 1965-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-08 | 1969-01-07 | 1969-07-09 | $7700.00 | Window Closed / Lapsed |