Patent US1548485A successfully refreshed from Google Patents.
Patent US2518397A successfully refreshed from Google Patents.
US2518397A
Expired / Lapsed
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Process for the production of aliphatic nitriles
Assignee: ExxonMobil Oil Corp
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Filing: 1948-09-01
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Granted: 1950-08-08
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Expires: 1968-09-01
Abstract
No abstract record available.
Inventors
- 👤 William A Stover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:18
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A PROCESS FOR THE PREPARATION OF ALIPHATIC NITRILES OF RELATIVELY HIGH MOLECULAR WEIGHT, WHICH COMPRISES CONTACTING A PARAFFINIC HYDROCARBON HAVING AT LEAST ONE TETIARY CARBON ATOM WITH AN UNSATURATED ALIPHATIC NITRILE, IN THE VAPOR PHASE, IN A REACTION ZONE, AT A TEMPERATURE FALLING WITHIN THE RANGE VARYING FROM ABOUT 500* F. TO ABOUT 900F., AND UNDER A PRESSURE OF AT LEAST ABOUT 500 POUNDS PER SQUARE INCH.
Claim 2
Dependent Claim
67 words
A PROCESS FOR THE PREPARATION OF ALIPHATIC NITRILES OF RELATIVELY HIGH MOLECULAR WEIGHT, WHICH COMPRISES CONTACTING A PARAFFINIC HYDROCARBON HAVING AT LEAST ONE TETIARY CARBON ATOM WITH AN UNSATURATED ALIPHATIC NITRILE, IN THE VAPOR PHASE, IN A REACTION ZONE, AT A TEMPERATURE FALLING WITHIN THE RANGE VARYING FROM ABOUT 500* F. TO ABOUT 900F., AND UNDER A PRESSURE OF AT LEAST ABOUT 500 POUNDS PER SQUARE INCH.
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) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |