US2789035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of sulfur dioxide from petroleum acid sludge
Assignee: Stauffer Chemical Co
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Filing: 1954-10-25
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Granted: 1957-04-16
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Expires: 1974-10-25
Abstract
No abstract record available.
Inventors
- 👤 Harvey Z Hurlburt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:43
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/48; C01B17/50; C01B17/58; Y; Y02; Y02P; Y02P20/00; Y02P20/10; Y02P20/129
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
54 words
A PROCESS FOR CONVERTING ACID SLUDGES CONTAINING CARBONACEOUS MATERIAL, SULFURIC ACID AND SULFUR COMPOUNDS BY BURNING SAID ACID ALUDGES IN A COMBUSTION CHAMBER; CONVEYING THE COMBUSTION GASES TO A COOLER WHERE A PART OF THE WATER VAPOR IS CONDENSED; EVAPORATING WATER FROM THE CONDENSATE; AND OCNVEYING THE RESULTING CONCENTRATED CONDENSATE INTO THE COMBUSTION CHAMBER.
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) | 1960-04-15 | 1960-10-15 | 1961-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-15 | 1964-10-15 | 1965-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-15 | 1968-10-15 | 1969-04-16 | $7700.00 | Window Closed / Lapsed |