US2587621A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving lubricants and lubricating oil additives
Assignee: Standard Oil Co
•
Filing: 1948-03-31
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Granted: 1952-03-04
•
Expires: 1968-03-31
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 12:00
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C07; C07F; C07F9/00; C07F9/02; C07F9/04; C10M2223/00; C10M2223/12; C10M2223/121; C10M2225/00; C10M2225/04; C10M2225/041
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A METHOD OF TREATING THE REACTION PRODUCT OF AN ORGANIC COMPOUND AND A PHOSPHORUS SULFIDE WHICH CONTAINS AT LEAST ONE MATERIAL SELECTED FROM THE GROUP CONSISTING OF MATERIAL IMPAIRING ITS CHARACTERISTICS AS AN OXIDATION-INHIBITING ADDITIVE FOR AN ACID-REFINED MINERAL LUBRICATING OIL AND MATERIAL IMPAIRING ITS CHARACTERISTICS AS A CORROSION-INHIBITING ADDITIVE FOR A SOLVENT-EXTRACTED MINERAL LUBRICATING OIL, TO REMOVE SAID IMPAIRING MATERIALS THEREFROM, WHICH COMPRISES MIXING SAID REACTION PRODUCT AS A SUBSTRATE WITH A LIQUID MATERIAL HAVING A SELECTIVE SOLVENT POWER FOR A PART OF SAID SUBSTRATE, WITH FORMATION OF AN EXTRACT PHASE AND A RAFFINATE PHASE, SEPARATING THE EXTRACT PHASE FROM THE RAFFINATE PHASE AND RECOVERING FROM THE EXTRACT PHASE A SUPERIOR MINERAL LUBRICATING OIL ADDITIVE HAVING IMPROVED INHIBITING PROPERTIES CONSISTING OF THE EXTRACT.
Claim 2
Independent Claim
124 words
A METHOD OF TREATING THE REACTION PRODUCT OF AN ORGANIC COMPOUND AND A PHOSPHORUS SULFIDE WHICH CONTAINS AT LEAST ONE MATERIAL SELECTED FROM THE GROUP CONSISTING OF MATERIAL IMPAIRING ITS CHARACTERISTICS AS AN OXIDATION-INHIBITING ADDITIVE FOR AN ACID-REFINED MINERAL LUBRICATING OIL AND MATERIAL IMPAIRING ITS CHARACTERISTICS AS A CORROSION-INHIBITING ADDITIVE FOR A SOLVENT-EXTRACTED MINERAL LUBRICATING OIL, TO REMOVE SAID IMPAIRING MATERIALS THEREFROM, WHICH COMPRISES MIXING SAID REACTION PRODUCT AS A SUBSTRATE WITH A LIQUID MATERIAL HAVING A SELECTIVE SOLVENT POWER FOR A PART OF SAID SUBSTRATE, WITH FORMATION OF AN EXTRACT PHASE AND A RAFFINATE PHASE, SEPARATING THE EXTRACT PHASE FROM THE RAFFINATE PHASE AND RECOVERING FROM THE EXTRACT PHASE A SUPERIOR MINERAL LUBRICATING OIL ADDITIVE HAVING IMPROVED INHIBITING PROPERTIES CONSISTING OF THE EXTRACT.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-04 | 1955-09-03 | 1956-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-04 | 1959-09-03 | 1960-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-04 | 1963-09-03 | 1964-03-04 | $7700.00 | Window Closed / Lapsed |