Patent US2672398A successfully refreshed from Google Patents.
US2672398A
Expired / Lapsed
US
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Process for the production of cyanogen chloride
Assignee: Evonik Operations GmbH
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Filing: 1950-04-17
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Granted: 1954-03-16
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Expires: 1970-04-17
Abstract
No abstract record available.
Inventors
- 👤 Huemer Hans
- 👤 Schulz Hermann
- 👤 Pohl Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:17
CPC Classifications
C; C01; C01C; C01C3/00; C01C3/004
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN A PROCESS FOR THE PRODUCTION OF CYANOGEN CHLORIDE WHEREIN AN AQUEOUS SOLUTION OF HYDROCYANIC ACID IS PASSED DOWNWARDLY THROUGH A CHLORINATION COLUMN COUNTER-CURRENT TO CHLORINE INTRODUCED AT THE BASE OF THE CLOUMN, WASHING THE CYANOGEN CHLORIDE FORMED WITH WATER AND INTRODUCING THE WASH WATER INTO THE HEAD OF THE COLUMN, THE STEPS WHICH COMPRISE MAINTAINING A CYCLE OF DILUTE AQUEOUS HYDROCYANIC ACID PASSING DOWNWARDLY THROUGH SAID COLUMN, INTRODUCING SUBSTANTIALLY EQUIMOLECULAR QUANTITIES OF CHLORINE AND FRESH HYDROCY ANIC ACID INTO SUCH CYCLE WHILE IT IS PASSING THROUGH SUCH COLUMN, THE QUANTITIES OF CHLORINE AND HYDROCYANIC ACID INTRODUCED BEING SUCH THAT THE CONCENTRATION OF THE DILUTE HYDROCYANIC ACID IN THE CYCLE REMAINS SUBSTANTIALLY CONSTANT WITHDRAWING A MINOR PORTION OF THE
Claim 2
Dependent Claim
119 words
IN A PROCESS FOR THE PRODUCTION OF CYANOGEN CHLORIDE WHEREIN AN AQUEOUS SOLUTION OF HYDROCYANIC ACID IS PASSED DOWNWARDLY THROUGH A CHLORINATION COLUMN COUNTER-CURRENT TO CHLORINE INTRODUCED AT THE BASE OF THE CLOUMN, WASHING THE CYANOGEN CHLORIDE FORMED WITH WATER AND INTRODUCING THE WASH WATER INTO THE HEAD OF THE COLUMN, THE STEPS WHICH COMPRISE MAINTAINING A CYCLE OF DILUTE AQUEOUS HYDROCYANIC ACID PASSING DOWNWARDLY THROUGH SAID COLUMN, INTRODUCING SUBSTANTIALLY EQUIMOLECULAR QUANTITIES OF CHLORINE AND FRESH HYDROCY ANIC ACID INTO SUCH CYCLE WHILE IT IS PASSING THROUGH SUCH COLUMN, THE QUANTITIES OF CHLORINE AND HYDROCYANIC ACID INTRODUCED BEING SUCH THAT THE CONCENTRATION OF THE DILUTE HYDROCYANIC ACID IN THE CYCLE REMAINS SUBSTANTIALLY CONSTANT WITHDRAWING A MINOR PORTION OF THE
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) | 1957-03-15 | 1957-09-14 | 1958-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-15 | 1961-09-14 | 1962-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-15 | 1965-09-14 | 1966-03-16 | $7700.00 | Window Closed / Lapsed |