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US3617209A
Expired / Lapsed
US
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Process for the removal of halogen-containing methane or ethane derivatives from hydrochloric acid
Assignee: Kali Chemie AG
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Filing: 1969-09-05
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Granted: 1971-11-02
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Expires: 1989-09-05
Abstract
Abstract A process for the removal of small quantities of fluorine and/or chlorine-containing methane or ethane derivatives from hydrochloric acid by passing air through said acid at a temperature between about 0* and 50* C.; preferably the hydrochloric acid and air are contacted countercurrently in a packed column.
Inventors
- 👤 Joachim Massonne
- 👤 Heinrich Paucksch
- 👤 Heinz Wiele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:49
CPC Classifications
C; C01; C01B; C01B7/00; C01B7/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1758351A
Cited
US2436432A
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US2615791A
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US3165453A
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US3192128A
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US3140244A
Cited
US3260059A
Cited
US3347021A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |