US2541789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mineral oil lubricant containing sulfurized and phosphorized propylene and butylene glycol esters of oleic acid
Assignee: Pure Oil Co
•
Filing: 1947-04-10
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Granted: 1951-02-13
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Expires: 1967-04-10
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Stucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:16
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2223/00; C10M2223/08; C10M2223/12; C10N; C10N2010/00; C10N2010/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A LUBRICANT COMPRISING A MAJOR PORTION OF A MID-CONTINENT SOLVENT REFINED PETROLEUM LUBRICATING OIL AND A MINOR PORTION OF A COMPOSITION AS THE PRINCIPAL ADDITIVE, EFFECTIVE TO IMPROVE ITS LOAD CARRYING CHARACTERISTICS, WHICH ADDITIVE CONSISTS SUBSTANTIALLY OF A SULFURIZED AND PHOSPHORIZED ESTER FROM THE GROUP CONSISTINJG OF PROPYLENE AND BUTYLENE GLYCOL DIOLEATES, THE SULFUR CONTENT OF SAID ADDITIVE BEING ABOUT 1 TO 10 PER CENT, AND THE PHOSPHORUS CONTENT BEING ABOUT 0.2 TO 0.6 PER CENT, SAID ADDITIVE BEING SOLUBLE IN SAID OIL.
Claim 2
Dependent Claim
83 words
A LUBRICANT COMPRISING A MAJOR PORTION OF A MID-CONTINENT SOLVENT REFINED PETROLEUM LUBRICATING OIL AND A MINOR PORTION OF A COMPOSITION AS THE PRINCIPAL ADDITIVE, EFFECTIVE TO IMPROVE ITS LOAD CARRYING CHARACTERISTICS, WHICH ADDITIVE CONSISTS SUBSTANTIALLY OF A SULFURIZED AND PHOSPHORIZED ESTER FROM THE GROUP CONSISTINJG OF PROPYLENE AND BUTYLENE GLYCOL DIOLEATES, THE SULFUR CONTENT OF SAID ADDITIVE BEING ABOUT 1 TO 10 PER CENT, AND THE PHOSPHORUS CONTENT BEING ABOUT 0.2 TO 0.6 PER CENT, SAID ADDITIVE BEING SOLUBLE IN SAID OIL.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |