Patent US2898286A successfully refreshed from Google Patents.
US2898286A
Expired / Lapsed
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Method of reducing corrosiveness of lubricating oils by hydrogenation
Assignee: Sinclair Refining Co
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Filing: 1955-08-04
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Granted: 1959-08-04
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Expires: 1975-08-04
Abstract
No abstract record available.
Inventors
- 👤 Milton P Kleinholz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:29
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/02; C10G2400/00; C10G2400/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A METHOD FOR THE MANUFACTURE OF PNON-ADDITIVE AIRCRAFT PISTON ENGINE LUBRICATING OIL OF LOW CORROSIVENESS WHEN TESTED BY THE MACCOULL-RYDER OXIDATION CORROSION TEST WHICH COMPRISES REACTING A MINERAL LUBRICATING OIL AND HYDROGEN WHILE IN CONTACT WITH A COBALT MOLYBDATE SUPPORTED ON ALUMINA CATALYST AT A TEMPERATURE OF ABOUT 500 TO 500*F., A PRESSURE OF ABOUT 400 TO 600 P.S.I.G. AND A WEIGHT HOULY SPACE VELOCITY OF ABOUT 3 TO 7.
Claim 2
Independent Claim
70 words
A METHOD FOR THE MANUFACTURE OF PNON-ADDITIVE AIRCRAFT PISTON ENGINE LUBRICATING OIL OF LOW CORROSIVENESS WHEN TESTED BY THE MACCOULL-RYDER OXIDATION CORROSION TEST WHICH COMPRISES REACTING A MINERAL LUBRICATING OIL AND HYDROGEN WHILE IN CONTACT WITH A COBALT MOLYBDATE SUPPORTED ON ALUMINA CATALYST AT A TEMPERATURE OF ABOUT 500 TO 500*F., A PRESSURE OF ABOUT 400 TO 600 P.S.I.G. AND A WEIGHT HOULY SPACE VELOCITY OF ABOUT 3 TO 7.
References Cited (Backward Citations)
US2577823A
Cited
US2706167A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |