US2590146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of hydrogen cyanide
Assignee: Freeport Minerals Co
•
Filing: 1949-03-24
•
Granted: 1952-03-25
•
Expires: 1969-03-24
Abstract
No abstract record available.
Inventors
- 👤 Barsky George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:39
CPC Classifications
C; C01; C01C; C01C3/00; C01C3/02; C01C3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A PROCESS FOR RECOVERING HYDROGEN CYANIDE FROM REACTANT GAS MIXTURES CONTAINING THE SAME WHICH COMPRISES INTIMATELY CONTACTING THE MIXTURE WITH AN AQUEOUS SOLUTION OF AN ACIDIC BORIC ACID-POLYHYDROXY ORGANIC COMPLEX THEREBY DISSOLVING AND STABILIZING THE SAME AND THEN VAPORIZING OFF THE CYANIDE FROM THE RESULTING SOLUTION.
Claim 2
Dependent Claim
46 words
A PROCESS FOR RECOVERING HYDROGEN CYANIDE FROM REACTANT GAS MIXTURES CONTAINING THE SAME WHICH COMPRISES INTIMATELY CONTACTING THE MIXTURE WITH AN AQUEOUS SOLUTION OF AN ACIDIC BORIC ACID-POLYHYDROXY ORGANIC COMPLEX THEREBY DISSOLVING AND STABILIZING THE SAME AND THEN VAPORIZING OFF THE CYANIDE FROM THE RESULTING SOLUTION.
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) | 1955-03-25 | 1955-09-24 | 1956-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-25 | 1959-09-24 | 1960-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-25 | 1963-09-24 | 1964-03-25 | $7700.00 | Window Closed / Lapsed |