Patent US2706675A successfully refreshed from Google Patents.
US2706675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of hydrogen cyanide
Assignee: Freeport Minerals Co
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Filing: 1950-10-03
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Granted: 1955-04-19
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Expires: 1970-10-03
Abstract
No abstract record available.
Inventors
- 👤 John B Chatelain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:28
CPC Classifications
C; C01; C01C; C01C3/00; C01C3/02; C01C3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A METHOD FOR RECOVERING HYDROGEN CYANIDE IN HIGH YIELDS FROM HOT GAS MIXTURES CONTAINING THE SAME WHICH COMPRISES COOLING THE SAID HOT GAS MIXTURES RAPIDLY FROM THE TEMPERATURE AT WHICH THEY ARE PRODUCED ABOVE 400* C. TO A TEMPERATURE BELOW 400* C. BY CONTACTING THE HOT GAS MIXTURE WITH A RELATIVELY COOL AQUEOUS ACIDIC SOLUTION OF A POLYHYDROXY-BORIC ACID COMPLEX, AND COLLECTING THE COOLED HYDROGEN CYANIDE THEREBY OBTAINED BEFORE THE SAME HAS BEEN DECOMPOSED AND LOST.
Claim 2
Independent Claim
76 words
A METHOD FOR RECOVERING HYDROGEN CYANIDE IN HIGH YIELDS FROM HOT GAS MIXTURES CONTAINING THE SAME WHICH COMPRISES COOLING THE SAID HOT GAS MIXTURES RAPIDLY FROM THE TEMPERATURE AT WHICH THEY ARE PRODUCED ABOVE 400* C. TO A TEMPERATURE BELOW 400* C. BY CONTACTING THE HOT GAS MIXTURE WITH A RELATIVELY COOL AQUEOUS ACIDIC SOLUTION OF A POLYHYDROXY-BORIC ACID COMPLEX, AND COLLECTING THE COOLED HYDROGEN CYANIDE THEREBY OBTAINED BEFORE THE SAME HAS BEEN DECOMPOSED AND LOST.
References Cited (Backward Citations)
US2106446A
Cited
US2086732A
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US2429262A
Cited
US2455987A
Cited
US2531287A
Cited
US2590146A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-18 | 1958-10-18 | 1959-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-18 | 1962-10-18 | 1963-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-18 | 1966-10-18 | 1967-04-19 | $7700.00 | Window Closed / Lapsed |