US3152170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of unsaturated aliphatic nitriles
Assignee: Distillers Co Yeast Ltd
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Filing: 1960-06-27
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Granted: 1964-10-06
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Expires: 1980-06-27
Abstract
No abstract record available.
Inventors
- 👤 Barclay John Lynn
- 👤 Bream John Bernard
- 👤 Hadley David James
- 👤 Stewart David Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:33
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/24; C07C253/26; B; B01; B01J; B01J23/00; B01J23/16; B01J23/18; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
THE PROCESS FOR THE PRODUCTION OF AN UNSATURATED ALIPHATIC NITRILE SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE AND METHACRYLONITRILE WHICH COMPRISES REACTING AT AN ELEVATED TEMPERATURE IN THE VAPOR PHASE AND IN THE PRESENCE OF AN INERT GASEOUS DILUENT, AN OLEFINE SELECTED FROM THE GROUP CONSISTING OF PROPYLENE, FOR THE PRODUCTION OF ACRYLONITRILE, AND ISOBUTENE, FOR THE PRODUCTION OF METHACRYLONITRILE, WITH OXYGEN AND AMMONIA OVER AN OXIDE COMPOSITION CONSISTING ESSENTIALLY OF ANTIMONY, TIN AND OXYGEN AS AN OXIDATION CATALYST IN WHICH THE ATOMIC RATIO OF TIN TO ANTIMONY IS BETWEEN 1:10 AND 10:1.
Claim 2
Dependent Claim
93 words
THE PROCESS FOR THE PRODUCTION OF AN UNSATURATED ALIPHATIC NITRILE SELECTED FROM THE GROUP CONSISTING OF ACRYLONITRILE AND METHACRYLONITRILE WHICH COMPRISES REACTING AT AN ELEVATED TEMPERATURE IN THE VAPOR PHASE AND IN THE PRESENCE OF AN INERT GASEOUS DILUENT, AN OLEFINE SELECTED FROM THE GROUP CONSISTING OF PROPYLENE, FOR THE PRODUCTION OF ACRYLONITRILE, AND ISOBUTENE, FOR THE PRODUCTION OF METHACRYLONITRILE, WITH OXYGEN AND AMMONIA OVER AN OXIDE COMPOSITION CONSISTING ESSENTIALLY OF ANTIMONY, TIN AND OXYGEN AS AN OXIDATION CATALYST IN WHICH THE ATOMIC RATIO OF TIN TO ANTIMONY IS BETWEEN 1:10 AND 10:1.
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) | 1967-10-06 | 1968-04-06 | 1968-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-06 | 1972-04-06 | 1972-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-06 | 1976-04-06 | 1976-10-06 | $7700.00 | Window Closed / Lapsed |