US2816867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil compositions
Assignee: Shell Development Co
•
Filing: 1955-03-21
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Granted: 1957-12-17
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Expires: 1975-03-21
Abstract
No abstract record available.
Inventors
- 👤 Robert J Moore
- 👤 Robert C Jones
- 👤 Roy E Thorpe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:46
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2201/00; C10M2201/08; C10M2201/082; C10M2201/083; C10M2203/00; C10M2203/02; C10M2203/022; C10M2203/024; C10M2203/04; C10M2203/06; C10M2203/10; C10M2205/00; C10M2205/02; C10M2205/026; C10M2205/04; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/024; C10M2207/026; C10M2207/027; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/14; C10M2207/141; C10M2207/142; C10M2207/144; C10M2207/146; C10M2207/16; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/101; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/044; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/10; C10M2215/24; C10M2215/26; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/06; C10M2219/062; C10M2219/066; C10M2219/068; C10M2219/08; C10M2219/082; C10M2219/085; C10M2219/086; C10M2219/087; C10M2219/089; C10M2219/10; C10M2219/102; C10M2219/104; C10M2219/106; C10M2221/00; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/045; C10M2223/06; C10M2223/065; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2010/06; C10N2010/08; C10N2010/12; C10N2010/14; C10N2010/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A MINERAL LUBRICATING OIL COMPOSITION CONSISTING ESSENTIALLY OF A MAJOR AMOUNT OF A MINERAL LUBRICATING OIL CONTAINING (1) FROM ABOUT 55% TO ABOUT 80% OF A MIXTURE OF MINERAL OIL SATURATED HYDROCARBONS OF LUBRICATING VISCOSITY CONSISTING OF UP TO 20% ISOPARFFINS AND THE BALANCE BEING NAPHTHENES, (2) FROM ABOUT 5% TO ABOUT 30% OF A MIXTURE OF MINERAL OIL MONOAROMATIC HYDROCARBONS AND (3) FROM ABOUT 5% TO ABOUT 40% OF A MIXTURE OF POLYAROMATIC COMPRISING A MIXTURE OF ALKYL NAPHTHALENES, ESSENTIALLY FREE FROM OTHER TYPES OF COMPONENTS OF MINERAL LUBRICATING OIL, AND FROM ABOUT 0.01% TO ABOUT 10% OF A MIXTURE OF AN OIL-SOLUBLE METAL SULFONATE AND AN OIL-SOLUBLE METAL PHENATE.
Claim 2
Dependent Claim
111 words
A MINERAL LUBRICATING OIL COMPOSITION CONSISTING ESSENTIALLY OF A MAJOR AMOUNT OF A MINERAL LUBRICATING OIL CONTAINING (1) FROM ABOUT 55% TO ABOUT 80% OF A MIXTURE OF MINERAL OIL SATURATED HYDROCARBONS OF LUBRICATING VISCOSITY CONSISTING OF UP TO 20% ISOPARFFINS AND THE BALANCE BEING NAPHTHENES, (2) FROM ABOUT 5% TO ABOUT 30% OF A MIXTURE OF MINERAL OIL MONOAROMATIC HYDROCARBONS AND (3) FROM ABOUT 5% TO ABOUT 40% OF A MIXTURE OF POLYAROMATIC COMPRISING A MIXTURE OF ALKYL NAPHTHALENES, ESSENTIALLY FREE FROM OTHER TYPES OF COMPONENTS OF MINERAL LUBRICATING OIL, AND FROM ABOUT 0.01% TO ABOUT 10% OF A MIXTURE OF AN OIL-SOLUBLE METAL SULFONATE AND AN OIL-SOLUBLE METAL PHENATE.
References Cited (Backward Citations)
US2767131A
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US2247475A
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US2355993A
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US2491120A
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US2606872A
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US2671758A
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US2674568A
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US2768128A
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US2756197A
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US2754254A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-16 | 1961-06-17 | 1961-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-16 | 1965-06-17 | 1965-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-16 | 1969-06-17 | 1969-12-17 | $7700.00 | Window Closed / Lapsed |