US3915871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition comprising naphthenic distillate, hydro-cracked lube and an antioxidant
Assignee: Sunoco Inc R&M
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Filing: 1972-10-16
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Granted: 1975-10-28
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Expires: 1992-10-16
Abstract
Abstract A lubricant composition comprises an unhydrorefined naphthenic distillate and a hydrocracked lube oil (preferably solvent extracted or hydrorefined to reduce or inhibit sludging on exposure to light) having a viscosity in the range of 80-3,000 SUS at 100*F and an oxidation inhibitor in amount effective to permit said composition to pass the ASTM D-943 oxidation test for a period of at least 300 hours, said amount being less than would be required to permit the same D-943 test performance for a similar composition wherein the hydrocracked lube oil is replaced by an unhydrocracked solvent refined lube of the same viscosity, viscosity-gravity constant, and viscosity index. The composition is useful in formulation of engine oils, refrigeration oils, transmission fluids, turbine oils, hydraulic oils, textile machinery lubricants, mist lubricants, etc.
Inventors
- 👤 Robert P Bryer
- 👤 Thomas D Newingham
- 👤 Ivor W Mills
- 👤 Glenn R Dimeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:20
CPC Classifications
C; C10; C10M; C10M101/00; C10M101/02; C10M169/00; C10M169/04; C10M2203/00; C10M2203/10; C10M2203/102; C10M2203/104; C10M2203/106; C10M2203/108; C10M2205/00; C10M2205/02; C10M2205/026; C10M2205/04; C10M2205/22; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/026; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2211/00; C10M2211/02; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/06; C10M2215/064; C10M2215/24; C10M2215/26; C10M2217/00; C10M2217/02; C10M2217/028; C10M2217/06; C10M2219/00; C10M2219/02; C10M2219/024; C10M2219/04; C10M2219/044; C10M2219/046; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/045; C10M2223/047; C10M2223/06; C10M2223/065; C10M2227/00; C10M2227/08; C10M2227/083; C10M2229/00; C10M2229/04; C10M2229/041; C10N; C10N2010/00; C10N2010/04; C10N2010/10; C10N2020/00; C10N2020/01; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/08; C10N2040/12; C10N2040/13
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
146 words
A COMPOSITION USEFUL AS A LUBRICANT, COMPRISING AN UNHYDROREFINED NAPHTHENIC DISTILLATE OF LUBRICATING VISCOSITY IN AMOUNT SUFFICIENT TO PROVEDE IMPROVED OXIDATION STABILITY AND A MAJOR AMOUNT OF A HYDROCRACKED LUBE OIL WHICH HAS BEEN SOLVENT EXTRACTED OR HYDROREFINED TO REDUCE OR INHIBITS SLUDGING OF THE OIL ON EXPOSURE TO ULTRAVIOLET LIGHT AND HAVING A VISCOSIT IN THE RANGE OF 80-3,000 SUS AT 100*F., AND A MINOR AMOUNT OF AN OXIDATION INHIBITOR CONSISTING ESSENTIALLY OF A MIXTURE OF PHENOLICS, AMINES, AND ZINC CARBAMATE, SAID AMOUNT BEING EFFECTIVE TO PERMIT SAID COMPOSITION AND TO PASS THE ASTM D-943 OXIDATION TEST FOR A PERIOD OF AT LEAST 300 HOURS, SAID AMOUNT BEING LESS THAN WOULD BE REQUIRED TO PERMIT THE SAME D-943 TEST PERFORMANCE FOR SAID COMPOSITION WHEREIN THE HYDROCRACKED LUBE OIL IS REPLACED BY AN UNHYDEOCRCKED SOLVENT REFINED LUBE OF THE SAME VISCOSITY, VISCOSITY-GRAVITY CONSTANT AND VISCOSITY INDEX.
Claim 2
Dependent Claim
146 words
A COMPOSITION USEFUL AS A LUBRICANT, COMPRISING AN UNHYDROREFINED NAPHTHENIC DISTILLATE OF LUBRICATING VISCOSITY IN AMOUNT SUFFICIENT TO PROVEDE IMPROVED OXIDATION STABILITY AND A MAJOR AMOUNT OF A HYDROCRACKED LUBE OIL WHICH HAS BEEN SOLVENT EXTRACTED OR HYDROREFINED TO REDUCE OR INHIBITS SLUDGING OF THE OIL ON EXPOSURE TO ULTRAVIOLET LIGHT AND HAVING A VISCOSIT IN THE RANGE OF 80-3,000 SUS AT 100*F., AND A MINOR AMOUNT OF AN OXIDATION INHIBITOR CONSISTING ESSENTIALLY OF A MIXTURE OF PHENOLICS, AMINES, AND ZINC CARBAMATE, SAID AMOUNT BEING EFFECTIVE TO PERMIT SAID COMPOSITION AND TO PASS THE ASTM D-943 OXIDATION TEST FOR A PERIOD OF AT LEAST 300 HOURS, SAID AMOUNT BEING LESS THAN WOULD BE REQUIRED TO PERMIT THE SAME D-943 TEST PERFORMANCE FOR SAID COMPOSITION WHEREIN THE HYDROCRACKED LUBE OIL IS REPLACED BY AN UNHYDEOCRCKED SOLVENT REFINED LUBE OF THE SAME VISCOSITY, VISCOSITY-GRAVITY CONSTANT AND VISCOSITY INDEX.
Claim 3
Dependent Claim
15 words
The composition of claim 1 wherein said naphthenic distillate is substantially free of naphthenic acids.
Claim 4
Dependent Claim
20 words
The composition of claim 2 wherein the amount of said naphthenic distillate is in the range of 0.5-20 volume %.
Claim 5
Dependent Claim
14 words
The composition of claim 1 wherein said hydrocracked lube oil has been solvent extracted.
Claim 6
Dependent Claim
14 words
The composition of claim 3 wherein said hydrocracked lube oil has been solvent extracted.
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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |