Patent US2540129A successfully refreshed from Google Patents.
US2540129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of iron from hydrocarbons
Assignee: MW Kellogg Co
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Filing: 1947-10-31
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Granted: 1951-02-06
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Expires: 1967-10-31
Abstract
No abstract record available.
Inventors
- 👤 George G Lauer
- 👤 Robert S Pratt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:06
CPC Classifications
C; C10; C10G; C10G29/00; C10G29/06; C07; C07C; C07C7/00; C07C7/148; C07C7/14833; C07C7/1485
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A METHOD FOR SEPARATING IRON FROM A MIXTURE CONTAINING SAME, A HYDROCARBON AND A CARBONYL WHICH COMPRISES TREATING SAID MIXTURE WITH AN AQUEOUS SOLUTION COMPRISING BETWEEN ABOUT 1% AND ABOUT 40% BY WEIGHT OF SODIUM BISULFITE WHEREBY A FERRUGINOUS SULFITE IS PRODUCED WITHOUT REACTING SAID CARBONYL, AND SEPARATING SAID FERRUGINOUS SULFITE FROM SAID HYDROCARBON AND CARBONYL.
Claim 2
Independent Claim
56 words
A METHOD FOR SEPARATING IRON FROM A MIXTURE CONTAINING SAME, A HYDROCARBON AND A CARBONYL WHICH COMPRISES TREATING SAID MIXTURE WITH AN AQUEOUS SOLUTION COMPRISING BETWEEN ABOUT 1% AND ABOUT 40% BY WEIGHT OF SODIUM BISULFITE WHEREBY A FERRUGINOUS SULFITE IS PRODUCED WITHOUT REACTING SAID CARBONYL, AND SEPARATING SAID FERRUGINOUS SULFITE FROM SAID HYDROCARBON AND CARBONYL.
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) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |