Patent US782843A successfully refreshed from Google Patents.
Patent CA957779A successfully refreshed from Google Patents.
US3369999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clay finishing of catalytically hydrofinished lubricating oils
Assignee: Gulf Research and Development Co
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Filing: 1964-12-08
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Granted: 1968-02-20
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Expires: 1984-12-08
Abstract
No abstract record available.
Inventors
- 👤 Robert E Donaldson
- 👤 Alfred C Goerss
- 👤 John R Strausser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:01
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/02; C10G45/04; C10G2400/00; C10G2400/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A PROCESS FOR PRODUCING LUBRICATING OIL STOCKS OF IMPROVED STABILITY, COMPRISING CONTACTING A LUBRICATING OIL DISTILLATE STOCK WITH HYDROGEN, IN THE PRESENCE OF A CATALYST COMPRISING A HYDROGENATING COMPONENT SELECTED FROM THE GROUP CONSISTING OF SULFIDES AND OXIDES OF (A) A COMBINATION OF ABOUT 2 TO 25 PERCENT BY WEIGHT MOLYBDENUM AND AT LEAST TWO IRON GROUP METALS WHERE THE IRON GROUP METALS ARE PRESENT IN SUCH AMOUNTS THAT THE RATIO OF EACH IRON GROUP METAL OT MOLYBDENUM IS LESS THAN ABOUT 0.4, AND (B) A COMBINATION OF ABOUT 5 TO 40 PERCENT BY WEIGHT OF NICKEL AND TUNGSTEN WHERE THE ATOMIC
Claim 2
Dependent Claim
102 words
A PROCESS FOR PRODUCING LUBRICATING OIL STOCKS OF IMPROVED STABILITY, COMPRISING CONTACTING A LUBRICATING OIL DISTILLATE STOCK WITH HYDROGEN, IN THE PRESENCE OF A CATALYST COMPRISING A HYDROGENATING COMPONENT SELECTED FROM THE GROUP CONSISTING OF SULFIDES AND OXIDES OF (A) A COMBINATION OF ABOUT 2 TO 25 PERCENT BY WEIGHT MOLYBDENUM AND AT LEAST TWO IRON GROUP METALS WHERE THE IRON GROUP METALS ARE PRESENT IN SUCH AMOUNTS THAT THE RATIO OF EACH IRON GROUP METAL OT MOLYBDENUM IS LESS THAN ABOUT 0.4, AND (B) A COMBINATION OF ABOUT 5 TO 40 PERCENT BY WEIGHT OF NICKEL AND TUNGSTEN WHERE THE ATOMIC
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) | 1971-02-19 | 1971-08-21 | 1972-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-19 | 1975-08-21 | 1976-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-19 | 1979-08-21 | 1980-02-20 | $7700.00 | Window Closed / Lapsed |