Patent US2538696A successfully refreshed from Google Patents.
US2538696A
Expired / Lapsed
US
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Lubricant composition
Assignee: —
•
Filing: —
•
Granted: 1951-01-16
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Expires: 1968-01-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:57
CPC Classifications
C; C10; C10M; C10M169/00; C10M169/04; C10M169/045; C10M159/00; C10M159/12; C10M159/123; C10M2203/00; C10M2203/10; C10M2203/1006; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/027; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/14; C10M2207/144; C10M2207/146; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/046; C10M2219/08; C10M2219/082; C10M2219/087; C10M2219/088; C10M2219/089; C10M2223/00; C10M2223/12; C10M2225/00; C10M2225/04; C10N; C10N2010/00; C10N2010/04; C10N2030/00; C10N2030/04; C10N2030/08; C10N2030/10; C10N2040/00; C10N2040/25; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A MINERAL OIL COMPOSITION CONSISTING ESSENTIALLY OF A MAJOR PORTION OF A PETROLEUM LUBRICATING OIL FRACTION, A MINOR PROPORTION, EFFECTIVE TO RETARD OXIDATION OF THE OIL BUT NOT LESS THAN ABOUT 0.5%, OF AN INHIBITOR RESULTING FROM THE REACTION OF AN ALKYLATED PHENOL WITH THE CONDENSATION PRODUCT OF TURPENTINE AND PHOSPHORUS PENTASULFIDE AND A MINOR PROPORTION EFFECTIVE TO AT LEAST NEUTRALIZE EXCESS PHOSPHORUS ACIDITY, OF A DETERGENT OF THE CLASS CONSISTING OF CALCIUM AND BARIUM PETROLEUM SULFONATES.
Claim 2
Dependent Claim
77 words
A MINERAL OIL COMPOSITION CONSISTING ESSENTIALLY OF A MAJOR PORTION OF A PETROLEUM LUBRICATING OIL FRACTION, A MINOR PROPORTION, EFFECTIVE TO RETARD OXIDATION OF THE OIL BUT NOT LESS THAN ABOUT 0.5%, OF AN INHIBITOR RESULTING FROM THE REACTION OF AN ALKYLATED PHENOL WITH THE CONDENSATION PRODUCT OF TURPENTINE AND PHOSPHORUS PENTASULFIDE AND A MINOR PROPORTION EFFECTIVE TO AT LEAST NEUTRALIZE EXCESS PHOSPHORUS ACIDITY, OF A DETERGENT OF THE CLASS CONSISTING OF CALCIUM AND BARIUM PETROLEUM SULFONATES.
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) | 1954-01-15 | 1954-07-17 | 1955-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-15 | 1958-07-17 | 1959-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-15 | 1962-07-17 | 1963-01-16 | $7700.00 | Window Closed / Lapsed |