US2730194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrochloric acid from chloral vent gases
Assignee: Velsicol Chemical LLC
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Filing: 1952-04-04
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Granted: 1956-01-10
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Expires: 1972-04-04
Abstract
No abstract record available.
Inventors
- 👤 Herbert C Wohlers
- 👤 Frank N Grover
- 👤 Charles W Lentz
- 👤 Loren E Pauling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:16
CPC Classifications
C; C01; C01B; C01B7/00; C01B7/09; C01B7/093
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
156 words
THE METHOD OF TREATING AN OFF GAS CONTAINING A HYDROGEN HALIDE AS THE MAJOR CONSTITUENT IN ADMIXTURE WITH GASEOUS IMPURITIES SOME OF WHICH ARE SOLUBLE IN THE ACID OF THE HYDROGEN HALIDE AND OTHERS OF WHICH ARE NOT, COMPRISING THE STEPS OF CONTACTING THE OFF GAS WITH A CONCENTRATED ACID OF THE HYDROGEN HALIDE IN AN AMOUNT RANGING FROM 5-25 PERCENT BY WEIGHT OF THE PRODUCT ACID CAPABLE OF BEING FORMED BY THE HYDROGEN HALIDE IN THE OFF GAS, CONTACTING THE GASES OF THE HYDROGEN HALIDE AND GASEOUS IMPURITIES INSOLUBLE IN THE ACID OF THE HYDROGEN HALIDE WITH AQUEOUS MEDIUM TO DISSOLVE OUT THE HYDROGEN HALIDE AND FORM THE ACID OF THE HYDROGEN HALIDE IN WHICH THE IMPURITIES INSOLUBLE IN THE ACID OF HYDROGEN HALIDE ARE INCAPABLE OF BEING DISSOLVED THEREBY TO PRODUCE A RELATIVELY PURE HYDROGEN HALIDE AS THE PRODUCT WHILE THE GASEOUS IMPURITIES INSOLUBLE IN THE HYDROGEN HALIDE ACID PASS OFF AS A GAS.
References Cited (Backward Citations)
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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) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |