US2834430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of hydrocarbons from sulfur dioxide gases
Assignee: American Smelting and Refining Co
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Filing: 1956-03-05
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Granted: 1958-05-13
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Expires: 1976-03-05
Abstract
No abstract record available.
Inventors
- 👤 Walter F Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:19
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/48; C01B17/50; C01B17/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
IN A PROCESS FOR REMOVING ORGANIC CONSTITUENTS WHICH DISCOLORIZE CONCENTRATED SULFURIC ACID FROM AN SO2 GAS INVOLVING CONTACTING A STREAM OF SAID GAS WITH AN ACTIVATED CARBON ADSORBENT TO REMOVE SAID DISCOLORIZING ORGANIC CONSTITUENTS FROM THE GAS, THE IMPROVEMENT WHICH COMPRISES ESTABLISHING IN SAID GAS STREAM A RELATIVE HUMIDITY BELOW ABOUT 10% AND PASSING THE THUS ESTABLISHED STREAM IN CONTACT WITH THE ACTIVATED CARBON ADSORBENT, WHEREBY THE ADSORPTIVE CAPACITY OF SAID ADSORBENT IS ENHANCED.
Claim 2
Dependent Claim
74 words
IN A PROCESS FOR REMOVING ORGANIC CONSTITUENTS WHICH DISCOLORIZE CONCENTRATED SULFURIC ACID FROM AN SO2 GAS INVOLVING CONTACTING A STREAM OF SAID GAS WITH AN ACTIVATED CARBON ADSORBENT TO REMOVE SAID DISCOLORIZING ORGANIC CONSTITUENTS FROM THE GAS, THE IMPROVEMENT WHICH COMPRISES ESTABLISHING IN SAID GAS STREAM A RELATIVE HUMIDITY BELOW ABOUT 10% AND PASSING THE THUS ESTABLISHED STREAM IN CONTACT WITH THE ACTIVATED CARBON ADSORBENT, WHEREBY THE ADSORPTIVE CAPACITY OF SAID ADSORBENT IS ENHANCED.
References Cited (Backward Citations)
US1939694A
Cited
US2519874A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |