Patent US3273312A successfully refreshed from Google Patents.
US3273312A
Expired / Lapsed
US
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Process for drying gases which contain hydrogen chloride
Assignee: Bayer AG
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Filing: 1964-05-18
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Granted: 1966-09-20
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Expires: 1984-05-18
Abstract
No abstract record available.
Inventors
- 👤 Zirngibl Hans
- 👤 Rademachers Jakob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:37
CPC Classifications
F; F26; F26B; F26B21/00; F26B21/30; F26B21/33; F26B21/331; B; B01; B01D; B01D53/00; B01D53/26; C; C01; C01B; C01B7/00; C01B7/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
PROCESS FOR DRYING GASES CONTAINING HYDROGEN CHLORIDE BY CONTACT WITH SEMI-CONCENTRATED SULFURIC ACID, WHICH COMPRISES CONDUCTING THE HYDROGEN CHLORIDE CONTAINING GAS IN COUNTER-CURRENT CONTACT WITH SEMI-CONCENTRATED SULFURIC ACID IN AN ABSORPTION STAGE, IN WHICH THE CONCENTRALON OF THE SULFURIC ACID ENTERING SUCH ABSORPTION STAGE IS ABOUT 65 TO 70% BY WEIGHT H2SO4 AND THE CONCENTRATION OF THE SULFURIC ACID DISCHARGING FROM SUCH ABSORPTION STAGE IS ABOUT 55 TO 65% BY WEIGH H2SO4, DISSIPATING THE HEAT EVOLVED DURING THE ABSORPTION STAGE CONTACT SO THAT THE
Claim 2
Dependent Claim
84 words
PROCESS FOR DRYING GASES CONTAINING HYDROGEN CHLORIDE BY CONTACT WITH SEMI-CONCENTRATED SULFURIC ACID, WHICH COMPRISES CONDUCTING THE HYDROGEN CHLORIDE CONTAINING GAS IN COUNTER-CURRENT CONTACT WITH SEMI-CONCENTRATED SULFURIC ACID IN AN ABSORPTION STAGE, IN WHICH THE CONCENTRALON OF THE SULFURIC ACID ENTERING SUCH ABSORPTION STAGE IS ABOUT 65 TO 70% BY WEIGHT H2SO4 AND THE CONCENTRATION OF THE SULFURIC ACID DISCHARGING FROM SUCH ABSORPTION STAGE IS ABOUT 55 TO 65% BY WEIGH H2SO4, DISSIPATING THE HEAT EVOLVED DURING THE ABSORPTION STAGE CONTACT SO THAT THE
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) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |