Patent US3157688A successfully refreshed from Google Patents.
US3157688A
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Catalytic process for the preparation of nitriles
Assignee: EIDP Inc
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Filing: 1960-03-16
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Granted: 1964-11-17
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Expires: 1980-03-16
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles Arnold
- 👤 Jurgen M Kruse
- 👤 Edward L Reilly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:24
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/835; B01J23/08; B01J23/14; B01J23/72; B01J23/825; B01J37/00; C; C07; C07C; C07C253/00; C07C253/02; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
IN THE PROCESS FOR THE PREPARATION OF ACRYLONITRILE WHICH COMPRISES CATALYTICALLY REACTING NITRIC OXIDE WITH PROPYLENE, THE IMPROVEMENT OF EFFECTING SAID REACTION AT A TEMPERATURE OF ABOUT FROM 250 TO 700*C. IN THE PRESENCE OF A CATALYST CONTAINING ABOUT FROM 0.5 TO 90% BY WEIGHT OF THALLIUM ION.
Claim 2
Dependent Claim
48 words
IN THE PROCESS FOR THE PREPARATION OF ACRYLONITRILE WHICH COMPRISES CATALYTICALLY REACTING NITRIC OXIDE WITH PROPYLENE, THE IMPROVEMENT OF EFFECTING SAID REACTION AT A TEMPERATURE OF ABOUT FROM 250 TO 700*C. IN THE PRESENCE OF A CATALYST CONTAINING ABOUT FROM 0.5 TO 90% BY WEIGHT OF THALLIUM ION.
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) | 1967-11-17 | 1968-05-18 | 1968-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-17 | 1972-05-18 | 1972-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-17 | 1976-05-18 | 1976-11-17 | $7700.00 | Window Closed / Lapsed |