US2734072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylonitrile process and catalyst
Assignee: —
•
Filing: —
•
Granted: 1956-02-07
•
Expires: 1973-02-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:17
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/08; C07C253/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
IN THE PROCESS FOR THE PRODUCTION OF ACRYLONITRILE BY THE REACTION OF ACETYLENE WITH HYDROGEN CYANIDE, THE STEP WHICH COMPRISES PASSING A GASEOUS MIXTURE OF SAID REACTANTS AT A REACTION TEMPERATURE THROUGH A CATALYST BED CONSISTING OF INACTIVE SUPPORT IMPREGNATED WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL CARBONATES, HYDROXIDES, BORATES AND CYANIDES, SAID CATALYST CONTAINING UPWARDS OF ABOUT 0.2% OF BISMUTH AS B1203.
Claim 2
Dependent Claim
67 words
IN THE PROCESS FOR THE PRODUCTION OF ACRYLONITRILE BY THE REACTION OF ACETYLENE WITH HYDROGEN CYANIDE, THE STEP WHICH COMPRISES PASSING A GASEOUS MIXTURE OF SAID REACTANTS AT A REACTION TEMPERATURE THROUGH A CATALYST BED CONSISTING OF INACTIVE SUPPORT IMPREGNATED WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL CARBONATES, HYDROXIDES, BORATES AND CYANIDES, SAID CATALYST CONTAINING UPWARDS OF ABOUT 0.2% OF BISMUTH AS B1203.
References Cited (Backward Citations)
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Cited
US1991448A
Cited
US2414762A
Cited
US2413623A
Cited
US2413496A
Cited
US2419186A
Cited
US2476771A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-06 | 1959-08-08 | 1960-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-06 | 1963-08-08 | 1964-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-06 | 1967-08-08 | 1968-02-07 | $7700.00 | Window Closed / Lapsed |