US3766090A
Expired / Lapsed
US
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Process for regenerating active carbon loaded with sulfuric acid
Assignee: Bergwerksverband GmbH
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Filing: 1971-07-19
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Granted: 1973-10-16
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Expires: 1991-07-19
Abstract
Abstract PROCESS FOR REGENERATING ACTIVE CARBON LOADED WITH SULFURIC ACID FOLLOWING ITS USE AS AN ADSORBENT FOR SO2 FROM EXHAUST GASES WHICH COMPRISES IN A FIRST STEP WASHING OUT THE MAJOR AMOUNT OF ADSORBED SULFURIC ACID WITH DILUTE SULFURIC ACID AND/OR MATER AND IN A SECOND STEP WASHING OUT THE REMAINING SULFURIC ACID USING WATER AND GASEOUS AMMONIA OR AMMONIA WATER AS WASHING AGENT.
Inventors
- 👤 H Juntgen
- 👤 K Knoblauch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:52
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; C; C01; C01B; C01B32/00; C01B32/30; C01B32/354; C01B32/36; C01C; C01C1/00; C01C1/24; C01C1/242; Y; Y10; Y10S; Y10S502/00; Y10S502/515; Y10S502/517
Claims Analysis
Total Claims: 0
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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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |