US3092654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of dicarboxylic acid nitriles
Assignee: EIDP Inc
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Filing: 1960-06-17
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Granted: 1963-06-04
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Expires: 1980-06-17
Abstract
No abstract record available.
Inventors
- 👤 Schreyer Ralph Courtenay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:27
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A PROCESS FOR THE PRODUCTION OF ADIPONITRILE WHICH COMPRISES CONTACTING 1,2-DICYANOCYCLOBUTANE IN THE VAPOR PHASE, WITH HYDROGEN, AND A HYDROGENATION CATALYST SELECTED FROM THE GROUP CONSISTING OF COPPER CHROMITE, NICKEL CHROMITE, COBALT CHROMITE, COBALT MOLYBDATE, REDUCED NICKEL OXIDE, REDUCED COBALT OXIDE, RHODIUM, PALLADIUM, RHODIUM ON ALUMINUM OXIDE, NICKEL ON ALUMINA, AND PLATIUM AND COPPER ON ALUMINUM OXIDE, AT A TEMPERATURE BETWEEN 150*C. AND 450*C. AND AT A PRESSURE BETWEEN 100 MM. OF HG AND 1000 P.S.I.G. FOR BETWEEN ABOUT 1 AND ABOUT 20 SECONDS.
Claim 2
Dependent Claim
84 words
A PROCESS FOR THE PRODUCTION OF ADIPONITRILE WHICH COMPRISES CONTACTING 1,2-DICYANOCYCLOBUTANE IN THE VAPOR PHASE, WITH HYDROGEN, AND A HYDROGENATION CATALYST SELECTED FROM THE GROUP CONSISTING OF COPPER CHROMITE, NICKEL CHROMITE, COBALT CHROMITE, COBALT MOLYBDATE, REDUCED NICKEL OXIDE, REDUCED COBALT OXIDE, RHODIUM, PALLADIUM, RHODIUM ON ALUMINUM OXIDE, NICKEL ON ALUMINA, AND PLATIUM AND COPPER ON ALUMINUM OXIDE, AT A TEMPERATURE BETWEEN 150*C. AND 450*C. AND AT A PRESSURE BETWEEN 100 MM. OF HG AND 1000 P.S.I.G. FOR BETWEEN ABOUT 1 AND ABOUT 20 SECONDS.
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) | 1966-06-03 | 1966-12-03 | 1967-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-03 | 1970-12-03 | 1971-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-03 | 1974-12-03 | 1975-06-04 | $7700.00 | Window Closed / Lapsed |