US3142697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of lower aliphatic nitriles
Assignee: Shell USA Inc
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Filing: 1961-05-31
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Granted: 1964-07-28
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Expires: 1981-05-31
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Jennings
- 👤 Hervey H Voge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:22
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/24; C07C253/26; B; B01; B01J; B01J27/00; B01J27/14; B01J27/185; B01J27/1853; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
THE PROCESS FOR THE PRODUCTION OF A NITRILE SELECTED FROM THE GROUP CONSISTING OF ACRYLONTRILE AND METHACRYLONITRILE WHICH CONSISTS OF REACTING AN OLEFIN SELECTED FROM THE GROUP CONSISTING OF PROPYLENE AND ISOBUTYLENE WITH AMMONIA, IN A MOLE RATIO OF AMMONIA TO SAID OLEFIN IN THE RANGE OF FROM ABOUT 0.5:1 TO ABOUT 2:1, IN THE PRESENCE OF MOLECULAR OXYGEN IN A MOLE RATION OF OXYGEN TO SAID OLEFIN IN THE RANGE OF FROM ABOUT 0.5:1 TO ABOUT 3:1, AND OF A CATALYST CONSISTING ESSENTIALLY OF IRON PHOSPHATE, AT A TEMPERATURE OF FROM ABOUT 350 TO ABOUT 550*C.
Claim 2
Dependent Claim
97 words
THE PROCESS FOR THE PRODUCTION OF A NITRILE SELECTED FROM THE GROUP CONSISTING OF ACRYLONTRILE AND METHACRYLONITRILE WHICH CONSISTS OF REACTING AN OLEFIN SELECTED FROM THE GROUP CONSISTING OF PROPYLENE AND ISOBUTYLENE WITH AMMONIA, IN A MOLE RATIO OF AMMONIA TO SAID OLEFIN IN THE RANGE OF FROM ABOUT 0.5:1 TO ABOUT 2:1, IN THE PRESENCE OF MOLECULAR OXYGEN IN A MOLE RATION OF OXYGEN TO SAID OLEFIN IN THE RANGE OF FROM ABOUT 0.5:1 TO ABOUT 3:1, AND OF A CATALYST CONSISTING ESSENTIALLY OF IRON PHOSPHATE, AT A TEMPERATURE OF FROM ABOUT 350 TO ABOUT 550*C.
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) | 1967-07-28 | 1968-01-27 | 1968-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-28 | 1972-01-27 | 1972-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-28 | 1976-01-27 | 1976-07-28 | $7700.00 | Window Closed / Lapsed |