US2562583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making acrylonitriles
Assignee: Union Carbide Corp
•
Filing: 1948-12-29
•
Granted: 1951-07-31
•
Expires: 1968-12-29
Abstract
No abstract record available.
Inventors
- 👤 Helmut W Schulz
- 👤 Albert E Pufahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:37
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
METHOD FOR MAKING AN ACRYLONITRILE OF THE GROUP CONSISTING OF ACRYLONITRILE AND METHACRYLONITRILE WHICH COMPRISES VAPORIZING ONE OF THE GROUP CONSISTING OF BETA-ALKOXYPROPIONAMIDE AND BETA-ALKOXY-ALPHA-METHYLPROPIONAMIDE WHEREIN THE ALKOXY GROUP CONTAINS UP TO SIX CARBON ATOMS, PASSING THE VAPORS THUS FORMED OVER A SILICA GEL CATALYST AT A TEMPERATURE OF 350* C. TO 500* C., AND FORMING A REACTION MIXTURE CONTAINING AN ACRYLONITRILE AS THE PRINICPAL NITROGEN-CONTAINING REACTION PRODUCT.
Claim 2
Dependent Claim
68 words
METHOD FOR MAKING AN ACRYLONITRILE OF THE GROUP CONSISTING OF ACRYLONITRILE AND METHACRYLONITRILE WHICH COMPRISES VAPORIZING ONE OF THE GROUP CONSISTING OF BETA-ALKOXYPROPIONAMIDE AND BETA-ALKOXY-ALPHA-METHYLPROPIONAMIDE WHEREIN THE ALKOXY GROUP CONTAINS UP TO SIX CARBON ATOMS, PASSING THE VAPORS THUS FORMED OVER A SILICA GEL CATALYST AT A TEMPERATURE OF 350* C. TO 500* C., AND FORMING A REACTION MIXTURE CONTAINING AN ACRYLONITRILE AS THE PRINICPAL NITROGEN-CONTAINING REACTION PRODUCT.
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) | 1954-07-30 | 1955-01-29 | 1955-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-30 | 1959-01-29 | 1959-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-30 | 1963-01-29 | 1963-07-31 | $7700.00 | Window Closed / Lapsed |