Patent US2543971A successfully refreshed from Google Patents.
US2543971A
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Apparatus and process for distillation of hcn
Assignee: Wyeth Holdings LLC
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Filing: 1947-04-24
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Granted: 1951-03-06
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Expires: 1967-04-24
Abstract
No abstract record available.
Inventors
- 👤 Alfred G Houpt
- 👤 Ludwig J Christmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:51
CPC Classifications
C; C01; C01C; C01C3/00; C01C3/02; C01C3/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
109 words
IN A PROCESS OF RECOVERING LIQUID HCN FROM DILUTE AQUEOUS LIQUORS THEREOF BY STRIPPING THE HCN FROM SAID LIQUORS AND CONDENSING THE HCN, THE IMPROVEMENT WHICH COMPRISES, STEAM STRIPPING UNDER INCREASED PRESSURE; SUBJECTING THE RESULTANT VAPORS TO CONDENSATION UNDER PRESSURE USING GROUND WATER AS COOLANT, SEPARATING THE CONDENSATE FROM ANY NON-CONDENSED VAPORS; AGAIN SUBJECTING THE NON-CONDENSED VAPORS TO CONDENSATION UNDER PRESSURE; SEPARATING THE RESULTANT CONDESANTE FROM ANY RESIDUAL GASES; COMBINING THE CONDENSATES; RETURING PART OF THE COMBINED CONDENSATE AS REFLUX TO SAID STEAM STRIPPING OPERATION, COLLECTING THE REMAINDER OF SAID COMBINED CONDENSATE AS PRODUCT, AND RELEASING THE PRESSURE ON SAID CONDENSATE PRODUCT; SAID OPERATIONS BEING CARRIED OUT IN ALUMINUM
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) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |