US2820011A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating compositions
Assignee: Shell Development Co
•
Filing: 1956-09-17
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Granted: 1958-01-14
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Expires: 1976-09-17
Abstract
No abstract record available.
Inventors
- 👤 Mahoney Clarence Lynn
- 👤 Diamond Hyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:54
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2203/00; C10M2203/10; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/027; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/14; C10M2207/141; C10M2207/144; C10M2207/146; C10M2207/16; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/067; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/06; C10M2219/062; C10M2219/066; C10M2219/068; C10M2219/08; C10M2219/082; C10M2219/087; C10M2219/088; C10M2219/089; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/06; C10M2223/065; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/12; C10N2040/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A MINERAL LUBRICATING OIL COMPOSITION COMPRISING A MAJOR AMOUNT OF AN AROMATIC FREE, ESSENTIALLY ISOPARAFFINIC LUBRICATING OIL OBTAINED BY ISOMERIZING A PARAFFIN WAX IN THE PRESENCE OF AN ISOMERIZING CATALYST AT A TEMPERATURE BETWEEN 300*C. AND 550*C. AND THEREAFTER DEAROMATIZING THE OIL AND INCORPORATING THEREIN FROM ABOUT 0.05% TO ABOUT 5% OF AN OIL-SOLUBLE CADMIUM DITHIOCARBAMATE AND AN OIL-SOLUBLE COPPER SALT IN AN AMOUNT FROM ABOUT 1 TO ABOUT 200 PARTS PER MILLION AS COPPER.
Claim 2
Dependent Claim
75 words
A MINERAL LUBRICATING OIL COMPOSITION COMPRISING A MAJOR AMOUNT OF AN AROMATIC FREE, ESSENTIALLY ISOPARAFFINIC LUBRICATING OIL OBTAINED BY ISOMERIZING A PARAFFIN WAX IN THE PRESENCE OF AN ISOMERIZING CATALYST AT A TEMPERATURE BETWEEN 300*C. AND 550*C. AND THEREAFTER DEAROMATIZING THE OIL AND INCORPORATING THEREIN FROM ABOUT 0.05% TO ABOUT 5% OF AN OIL-SOLUBLE CADMIUM DITHIOCARBAMATE AND AN OIL-SOLUBLE COPPER SALT IN AN AMOUNT FROM ABOUT 1 TO ABOUT 200 PARTS PER MILLION AS COPPER.
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) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |