Patent US2762834A successfully refreshed from Google Patents.
US2762834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of acrylonitrile
Assignee: National Research Corp
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Filing: 1953-09-24
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Granted: 1956-09-11
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Expires: 1973-09-24
Abstract
No abstract record available.
Inventors
- 👤 Jr James F Gabbett
- 👤 Nat C Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:57
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/08; C07C253/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
THE PROCESS OF PRODUCING ACRYLONITRILE FROM HYDROGEN CYANIDE AND ACETYLENE WHICH COMPRISES HEATING UNACTIVATED CHARCOAL TO A TEMPERATURE ABOVE ABOUT 500*C., PASSING HYDROGEN OVER SAID HEATED CHARCOAL UNTIL SUBSTANTIALLY ALL THE OXYGEN HAS BEEN REMOVED FROM SAID CHARCOAL, IMPREGNATING SAID DEOXYGENATED CHARCOAL WITH A COMPOUND FROM THE GROUP CONSISTING OF THE ALKALI METAL HYDROXIDES, CYANIDES, AND CARBONATES, PASSING HYDROGEN CYANIDE AND ACETYLENE OVER THE THUS PREPARED CATALYST AT A TEMPERATURE WITHIN THE RANGE OF 500*C.-700*C.
Claim 2
Dependent Claim
75 words
THE PROCESS OF PRODUCING ACRYLONITRILE FROM HYDROGEN CYANIDE AND ACETYLENE WHICH COMPRISES HEATING UNACTIVATED CHARCOAL TO A TEMPERATURE ABOVE ABOUT 500*C., PASSING HYDROGEN OVER SAID HEATED CHARCOAL UNTIL SUBSTANTIALLY ALL THE OXYGEN HAS BEEN REMOVED FROM SAID CHARCOAL, IMPREGNATING SAID DEOXYGENATED CHARCOAL WITH A COMPOUND FROM THE GROUP CONSISTING OF THE ALKALI METAL HYDROXIDES, CYANIDES, AND CARBONATES, PASSING HYDROGEN CYANIDE AND ACETYLENE OVER THE THUS PREPARED CATALYST AT A TEMPERATURE WITHIN THE RANGE OF 500*C.-700*C.
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) | 1959-09-11 | 1960-03-12 | 1960-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-11 | 1964-03-12 | 1964-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-11 | 1968-03-12 | 1968-09-11 | $7700.00 | Window Closed / Lapsed |