Patent US2604380A successfully refreshed from Google Patents.
US2604380A
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US
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Manufacture of hydrogen cyanide
Assignee: Honeywell International Inc
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Filing: 1946-10-01
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Granted: 1952-07-22
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Expires: 1966-10-01
Abstract
No abstract record available.
Inventors
- 👤 Herman A Beekhuis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:09
CPC Classifications
C; C01; C01C; C01C3/00; C01C3/02; C01C3/0204
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
IN THE MANUFACTURE OF HYDROGEN CYANIDE BY THE CATALYTIC DECOMPOSITON OF FORMAMIDE IN CONTACT WITH AN HCN-FORMING CATALYST, THE IMPROVEMENT WHICH COMPRISES PASSING FORMAMIDE VAPOR AT A TEMPERATURE INTO DIRECT CONTACT WITH A SITION TEMPERATURE BELOW THE PREVAILING DECOMPOMOVING HCN-FORMING CATALYST AT A TEMPERATURE BETWEEN 400* AND 700* C. AND INTERMITTENTLY REHEATING THE CTALYST TO A TEMPERATURE ABOVE THE DECOMPOSITION TEMPERATURE AND AT LEAST 200* C. ABOVE THE ENTERING FORMAMIDE VAPOR TEMPERATURE BY DIRECT CONTACT OF THE ACTIVE CATALYST SURFACE WITH A HOT COMBUSTION GAS MIXTURE TO SUPPLY THE HEAT OF DECOMPOSITION, AT LEAST PART OF THE REHEATING GAS MIXTURE CONTAINING FREE OXYGEN.
Claim 2
Dependent Claim
103 words
IN THE MANUFACTURE OF HYDROGEN CYANIDE BY THE CATALYTIC DECOMPOSITON OF FORMAMIDE IN CONTACT WITH AN HCN-FORMING CATALYST, THE IMPROVEMENT WHICH COMPRISES PASSING FORMAMIDE VAPOR AT A TEMPERATURE INTO DIRECT CONTACT WITH A SITION TEMPERATURE BELOW THE PREVAILING DECOMPOMOVING HCN-FORMING CATALYST AT A TEMPERATURE BETWEEN 400* AND 700* C. AND INTERMITTENTLY REHEATING THE CTALYST TO A TEMPERATURE ABOVE THE DECOMPOSITION TEMPERATURE AND AT LEAST 200* C. ABOVE THE ENTERING FORMAMIDE VAPOR TEMPERATURE BY DIRECT CONTACT OF THE ACTIVE CATALYST SURFACE WITH A HOT COMBUSTION GAS MIXTURE TO SUPPLY THE HEAT OF DECOMPOSITION, AT LEAST PART OF THE REHEATING GAS MIXTURE CONTAINING FREE OXYGEN.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-22 | 1956-01-21 | 1956-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-22 | 1960-01-21 | 1960-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-22 | 1964-01-21 | 1964-07-22 | $7700.00 | Window Closed / Lapsed |