US2920940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of hydrocyanic acid
Assignee: Evonik Operations GmbH
•
Filing: 1955-07-12
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Granted: 1960-01-12
•
Expires: 1975-07-12
Abstract
No abstract record available.
Inventors
- 👤 Kronacher Hermann
- 👤 Dichtl Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:29
CPC Classifications
C; C01; C01C; C01C3/00; C01C3/02; C01C3/0208; C01C3/0237; C01C3/0229; C01C3/0233
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
IN A METHOD OF PRODUCING HYDROCYANIC ACID BY CATALYTIC REACTION OF AMMONIA WITH CARBON MONOXIDE THE STEPS OF PASSING THE REACTING GASES IN A REACTOR UPWARDLY THROUGH A REACTION ZONE CONTAINING FINELY DIVIDED CATALYST, MAINTAINING A RATE OF FLOW SUFFICIENT TO KEEP SAID CATALYST FLOATING IN TURBULENT MOTION CONFINED WITHIN SAID REACTION ZONE, HEATING THE REACTION ZONE AT REACTION TEMPERATURE BY MEANS OF HEATING ELEMENTS, CONTAINING THE UPWARD FLOW OF THE GASES IN THE REACTOR BEYOND THE FLOATING CATALYST CONTAINING REACTION ZONE INTO A ZONE FREE OF CATALYST, AND WITHDRAWING THE GASES, SAID CATALYST CON-
Claim 2
Dependent Claim
95 words
IN A METHOD OF PRODUCING HYDROCYANIC ACID BY CATALYTIC REACTION OF AMMONIA WITH CARBON MONOXIDE THE STEPS OF PASSING THE REACTING GASES IN A REACTOR UPWARDLY THROUGH A REACTION ZONE CONTAINING FINELY DIVIDED CATALYST, MAINTAINING A RATE OF FLOW SUFFICIENT TO KEEP SAID CATALYST FLOATING IN TURBULENT MOTION CONFINED WITHIN SAID REACTION ZONE, HEATING THE REACTION ZONE AT REACTION TEMPERATURE BY MEANS OF HEATING ELEMENTS, CONTAINING THE UPWARD FLOW OF THE GASES IN THE REACTOR BEYOND THE FLOATING CATALYST CONTAINING REACTION ZONE INTO A ZONE FREE OF CATALYST, AND WITHDRAWING THE GASES, SAID CATALYST CON-
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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) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |