US2732397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of aliphatic nitriles
Assignee: —
•
Filing: —
•
Granted: 1956-01-24
•
Expires: 1973-01-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:23
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A PROCESS FOR THE PRODUCTION OF AN ALIPHATIC NITRILE WHICH COMPRISES REACTING GASEOUS AMMONIA WITH AN ALIPHATIC CARBOXYLIC ACID CONTAINING 2 TO 4 CARBON ATOMS AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 180-212* C. TO FORM AN ALIPHATIC AMIDE-ACID MIXTURE, DISTILLING THE AMIDE-ACID MIXTURE TO SEPARATE THE ACID, AND THEREAFTER DEHYDRATING THE AMIDE IN THE SAID MIXTURE TO THE ALIPHATIC NITRILE BY PASSING OVER A DEHYDRATION CATALYST.
Claim 2
Dependent Claim
68 words
A PROCESS FOR THE PRODUCTION OF AN ALIPHATIC NITRILE WHICH COMPRISES REACTING GASEOUS AMMONIA WITH AN ALIPHATIC CARBOXYLIC ACID CONTAINING 2 TO 4 CARBON ATOMS AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 180-212* C. TO FORM AN ALIPHATIC AMIDE-ACID MIXTURE, DISTILLING THE AMIDE-ACID MIXTURE TO SEPARATE THE ACID, AND THEREAFTER DEHYDRATING THE AMIDE IN THE SAID MIXTURE TO THE ALIPHATIC NITRILE BY PASSING OVER A DEHYDRATION CATALYST.
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) | 1959-01-23 | 1959-07-25 | 1960-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-23 | 1963-07-25 | 1964-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-23 | 1967-07-25 | 1968-01-24 | $7700.00 | Window Closed / Lapsed |