Patent US5918159A successfully refreshed from Google Patents.
US2809930A
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Removal of sulfur compounds from fluids
Assignee: American Dev Corp
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Filing: 1954-11-18
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Granted: 1957-10-15
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Expires: 1974-11-18
Abstract
No abstract record available.
Inventors
- 👤 Miller Ralph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:12
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/52; B01D53/523; C; C10; C10G; C10G53/00; C10G67/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
THE METHOD OF REMOVING FROM A FLUID CONTAMINATING AMOUNTS OF SULFUR COMPOUNDS OXIDIZABLE TO READILY REMOVABLE SULFUR-CONTAINING SUBSTANCES, COMPRISING EXTRACTING SAID FLUID WITH AQUEOUS BRINE CONTAINING CAUSTIC ALKALI, WHEREBY SAID ALKALI IS REACTED WITH SAID SULFUR COMPOUND TO OBTAIN AN EXTRACT, MIXING SAID EXTRACT WITH A BRINE CONTAINING BROMINE IN SUFFICIENT AMOUNT TO REACT AND CONVERT SUBSTANTIALLY ALL OF THE SULFUR COMPOUND INTO A READILY REMOVABLE SULFUR-CONTAINING SUBSTANCE, REMOVING SAID READILY-REMOVABLE SUBSTANCE FROM SAID REACTION MIXTURE, THEREBY LEAVING A CELL FEED LIQUID, ELECTROLYZING A MAJOR PROPORTION OF SAID CELL FEED LIQUID AS ANOLYTE UNDER CONDITIONS TO PRODUCE SUBSTANTIAL AMOUNTS OF BROMINE IN THE BRINE, EMPLOYING SAID BROMINE-CONTAINING BRINE TO REACT WITH SAID EXTRACT AS AFORESAID, AND ELECTROLYZING A MINOR PROPORTION OF SAID CELL FEED LIQUID AS CATHOLYTE, THEREBY PRODUCING A BRINE-CONTAINING CAUSTIC ALKALI FOR USE IN EXTRACTING SAID SULFUR IMPURITY-CONTAINING FLUID AS AFORESAID.
Claim 2
Independent Claim
143 words
THE METHOD OF REMOVING FROM A FLUID CONTAMINATING AMOUNTS OF SULFUR COMPOUNDS OXIDIZABLE TO READILY REMOVABLE SULFUR-CONTAINING SUBSTANCES, COMPRISING EXTRACTING SAID FLUID WITH AQUEOUS BRINE CONTAINING CAUSTIC ALKALI, WHEREBY SAID ALKALI IS REACTED WITH SAID SULFUR COMPOUND TO OBTAIN AN EXTRACT, MIXING SAID EXTRACT WITH A BRINE CONTAINING BROMINE IN SUFFICIENT AMOUNT TO REACT AND CONVERT SUBSTANTIALLY ALL OF THE SULFUR COMPOUND INTO A READILY REMOVABLE SULFUR-CONTAINING SUBSTANCE, REMOVING SAID READILY-REMOVABLE SUBSTANCE FROM SAID REACTION MIXTURE, THEREBY LEAVING A CELL FEED LIQUID, ELECTROLYZING A MAJOR PROPORTION OF SAID CELL FEED LIQUID AS ANOLYTE UNDER CONDITIONS TO PRODUCE SUBSTANTIAL AMOUNTS OF BROMINE IN THE BRINE, EMPLOYING SAID BROMINE-CONTAINING BRINE TO REACT WITH SAID EXTRACT AS AFORESAID, AND ELECTROLYZING A MINOR PROPORTION OF SAID CELL FEED LIQUID AS CATHOLYTE, THEREBY PRODUCING A BRINE-CONTAINING CAUSTIC ALKALI FOR USE IN EXTRACTING SAID SULFUR IMPURITY-CONTAINING FLUID AS AFORESAID.
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) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |