Patent US2644834A successfully refreshed from Google Patents.
US2644834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of nitriles
Assignee: Shell Development Co
•
Filing: 1950-12-19
•
Granted: 1953-07-07
•
Expires: 1970-12-19
Abstract
No abstract record available.
Inventors
- 👤 Max Nicolaas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:27
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A METHOD OF PRODUCING NITRILES WHICH CONSISTS OF HEATING AN ALCOHOL WITH AMMONIA IN THE PRESENCE OF A CATALYST CONSISTING OF AT LEAST ONE METAL SULFIDE OF THE GROUP CONSISTING OF ZINC SULFIDE, TUNGSTEN SULFIDE, NICKEL SULFIDE, VANADIUM SULFIDE, MAGNESIUM SULFIDE, TITANIUM SULFIDE AND CHROMIUM SULFIDE, AND RECOVERING THE NITRILE PRODUCT FROM THE RESULTING MIXTURE.
Claim 2
Independent Claim
55 words
A METHOD OF PRODUCING NITRILES WHICH CONSISTS OF HEATING AN ALCOHOL WITH AMMONIA IN THE PRESENCE OF A CATALYST CONSISTING OF AT LEAST ONE METAL SULFIDE OF THE GROUP CONSISTING OF ZINC SULFIDE, TUNGSTEN SULFIDE, NICKEL SULFIDE, VANADIUM SULFIDE, MAGNESIUM SULFIDE, TITANIUM SULFIDE AND CHROMIUM SULFIDE, AND RECOVERING THE NITRILE PRODUCT FROM THE RESULTING MIXTURE.
References Cited (Backward Citations)
US2053193A
Cited
FR790262A
Cited
US2375016A
Cited
US2337421A
Cited
US2337422A
Cited
US2388218A
Cited
US2500256A
Cited
US2487299A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |