US2673196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating phosphorus sulfide-organic compound-metal derivative lubricant additives
Assignee: Standard Oil Co
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Filing: 1951-05-21
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Granted: 1954-03-23
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Expires: 1971-05-21
Abstract
No abstract record available.
Inventors
- 👤 Everett C Hughes
- 👤 John D Bartleson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:47
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C10; C10M; C10M1/00; C10M1/08; C10M2223/00; C10M2223/12; C10M2225/00; C10M2225/04; C10M2225/041; C10N; C10N2010/00; C10N2010/04; C10N2010/06; C10N2010/08; C10N2010/10; C10N2010/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A METHOD OF TREATING LUBRICANT ADDITIVES WHICH ARE PHOSPHORUS SULFIDE-ORGANIC COMPOUNDMETAL DERIVATIVES TO REMOVE THEREFROM MATERIAL CONTAINED THEREIN IMPAIRING THEIR OPTIMUM CHARACTERISTICS AS CORROSION-INHIBITING ADDITIVES FOR MINERAL LUBRICATING OIL WHICH COMPRISES MIXING SAID DERIVATIVE WITH A SOLVENT HAVING A SELECTIVE SOLVENT POWER FOR SAID MATERIAL WITH FORMATION OF AN EXTRACT PHASE AND A RAFFINATE PHASE, SEPARATING THE RAFFINATE PHASE FROM THE EXTRACT PHASE AND RECOVERING SAID METAL DERIVATIVE FROM THE RAFFINATE PHASE.
Claim 2
Independent Claim
72 words
A METHOD OF TREATING LUBRICANT ADDITIVES WHICH ARE PHOSPHORUS SULFIDE-ORGANIC COMPOUNDMETAL DERIVATIVES TO REMOVE THEREFROM MATERIAL CONTAINED THEREIN IMPAIRING THEIR OPTIMUM CHARACTERISTICS AS CORROSION-INHIBITING ADDITIVES FOR MINERAL LUBRICATING OIL WHICH COMPRISES MIXING SAID DERIVATIVE WITH A SOLVENT HAVING A SELECTIVE SOLVENT POWER FOR SAID MATERIAL WITH FORMATION OF AN EXTRACT PHASE AND A RAFFINATE PHASE, SEPARATING THE RAFFINATE PHASE FROM THE EXTRACT PHASE AND RECOVERING SAID METAL DERIVATIVE FROM THE RAFFINATE PHASE.
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) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |