Patent US5540660A successfully refreshed from Google Patents.
Patent US2748156A successfully refreshed from Google Patents.
US2748156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of acrylonitrile
Assignee: BASF SE
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Filing: 1953-03-16
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Granted: 1956-05-29
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Expires: 1973-03-16
Abstract
No abstract record available.
Inventors
- 👤 Keller Rudolf
- 👤 Eder Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:30
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/08; C07C253/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A PROCESS OF PRODCING ACRYLONITRILE WHICH COMPRISES REACTING HYDROCYANIC ACID WITH A GAS MIXTURE CONTAINING FROM 5 TO 10% BY VOLUME OF ACETYLENE AND FROM 10 TO 40% BY VOLUME OF CARBON MONOXIDE OBTAINED BY THE INCOMPLETE COMBUSTION OF SATURATED GASEOUS ALIPHATIC HYDROCARBONS IN A SOLUTION HEATED AT A TEMPERATURE FROM 60* TO 90* C. OF A CUPROUS SALT AS A CATALYST AND A SOLUBILIZER THEREFOR, THE CATALYST SOLUTION CONTAINING ALSO A COMPOUND SELECTED FROM THE CLASS CONSISTING OF A CERIUMIII-SALT AND A LANTHANUM SALT AND BEING ADJUSTED BY THE ADDITION OF A STRONG ACID TO A PH-VALUE FROM 0.2 TO 4.
Claim 2
Dependent Claim
102 words
A PROCESS OF PRODCING ACRYLONITRILE WHICH COMPRISES REACTING HYDROCYANIC ACID WITH A GAS MIXTURE CONTAINING FROM 5 TO 10% BY VOLUME OF ACETYLENE AND FROM 10 TO 40% BY VOLUME OF CARBON MONOXIDE OBTAINED BY THE INCOMPLETE COMBUSTION OF SATURATED GASEOUS ALIPHATIC HYDROCARBONS IN A SOLUTION HEATED AT A TEMPERATURE FROM 60* TO 90* C. OF A CUPROUS SALT AS A CATALYST AND A SOLUBILIZER THEREFOR, THE CATALYST SOLUTION CONTAINING ALSO A COMPOUND SELECTED FROM THE CLASS CONSISTING OF A CERIUMIII-SALT AND A LANTHANUM SALT AND BEING ADJUSTED BY THE ADDITION OF A STRONG ACID TO A PH-VALUE FROM 0.2 TO 4.
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) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |