Patent US2885357A successfully refreshed from Google Patents.
US2885357A
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Filtering oil solution of calcium sulfonate using a synthetic polyelectrolyte
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1954-10-19
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Granted: 1959-05-05
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Expires: 1974-10-19
Abstract
No abstract record available.
Inventors
- 👤 Francis M Archibald
- 👤 William A Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:01
CPC Classifications
B; B01; B01D; B01D37/00; B01D37/03; C; C10; C10G; C10G31/00; C10G31/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
THE METHOD OF REMOVING INSOLUBLE FINELY DIVIDED MATTER FROM AN OIL SOLUTION OF CALCIUM SULFONATE CONTAINING ABOUT 0.1 TO 1.0 WT. PERCENT OF WATER WHICH COMPRISES INCORPORATING WITHIN THE OIL SOLUTION ABOUT 0.001 TO 0.01 WT. PERCENT OF A SYNTHETIC, POLYMERIC WATER-SOLUBLE POLYELECTROLYTE HAVING A MOL. WT. OF AT LEAST 10,000 AND CONTAINING A SUBSTANTIALLY LINEAR CONTINOUS CARBON CHAIN DERIVED BY THE POLYMERIZATION OF AN ALIPHATIC UNSATURATED GROUP, AND THEREAFTER PASSING THE SOLUTION THROUGH A FILTER WHEREBY THE INSOLUBLE MATTER IS SEPARATED FROM THE SOLUTION.
Claim 2
Independent Claim
85 words
THE METHOD OF REMOVING INSOLUBLE FINELY DIVIDED MATTER FROM AN OIL SOLUTION OF CALCIUM SULFONATE CONTAINING ABOUT 0.1 TO 1.0 WT. PERCENT OF WATER WHICH COMPRISES INCORPORATING WITHIN THE OIL SOLUTION ABOUT 0.001 TO 0.01 WT. PERCENT OF A SYNTHETIC, POLYMERIC WATER-SOLUBLE POLYELECTROLYTE HAVING A MOL. WT. OF AT LEAST 10,000 AND CONTAINING A SUBSTANTIALLY LINEAR CONTINOUS CARBON CHAIN DERIVED BY THE POLYMERIZATION OF AN ALIPHATIC UNSATURATED GROUP, AND THEREAFTER PASSING THE SOLUTION THROUGH A FILTER WHEREBY THE INSOLUBLE MATTER IS SEPARATED FROM THE SOLUTION.
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) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |