US2915448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydro-refining method for lubricating oils and wax using nickel molybdate or silver molybdate on alumina
Assignee: Pure Oil Co
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Filing: 1956-05-25
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Granted: 1959-12-01
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Expires: 1976-05-25
Abstract
No abstract record available.
Inventors
- 👤 Weldon G Annable
- 👤 William L Jacobs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:52
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/02; C10G45/04; C10G2400/00; C10G2400/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
99 words
THE METHOD OF DECOLORIZING A MICROCRYSTALLINE WAX WITHOUT IMPAIRING THE PENETRATION MELTING POINT, AND NATURAL RESISTANCE OF OXIDATION AND DETERIORATION DUE TO NATURALLY-OCCURING SULFUR COMPOUNDS CONTAINED THEREIN WHICH CONSISTS IN CONTACTING SAID MICROCRYSTALLINE WAX WITH HYDROGEN AT A TEMPERATURE OF ABOUT 550*F. IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP OF AN ALUMINA BASE CONTAINING ABOUT 15.8 WEIGHT PERCENT OF NICKEL MOLYBDATE AND AN ALUMINA BASE CONTAINING ABOUT 16.7 WEIGHT PERCENT OF SILVER MOLYBDATE, AND RECOVERING A HYDROGENATED MICROCRYSTALLINE WAX OF IMPROVED COLOR, AND HAVING SUBSTANTIALLY THE SAME MELTING POINT, PENETRATION, AND CONTENT OF SAID SULFUR COMPOUNDS.
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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) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |