US3878115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating compositions for marine diesel engines
Assignee: Labofina SA
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Filing: 1973-12-11
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Granted: 1975-04-15
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Expires: 1993-12-11
Abstract
Abstract A lubricating composition for marine diesel engines comprising (1) 50 to 90 parts by weight of mineral base oil, (2) 50 to 10% parts by weight of a mixture of polymers selected from the group consisting of hydrogenated and non-hydrogenated polybutenes and polyisobutylenes, said mixture comprising a polymer having a Saybolt viscosity at 210*F of between 150 and 3,000 SSU and a polymer having a Saybolt viscosity at 210*F of between 40 and 100 SSU, and (3) a superbasic additive, said lubricating composition having an alkalinity index of between 60 and 70.
Inventors
- 👤 George Jules Souillard
- 👤 Guaethoven Frederic Franco Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:00
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2203/00; C10M2203/10; C10M2203/102; C10M2203/104; C10M2203/106; C10M2205/00; C10M2205/02; C10M2205/026; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/028; C10M2219/00; C10M2219/04; C10M2219/046; C10N; C10N2020/00; C10N2020/01; C10N2040/00; C10N2040/25; C10N2040/252; C10N2040/253; F; F02; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
123 words
A LUBRICATING COMPOSITION FOR MARINE DIESEL ENGINES COMPRISING (1) 50 TO 90 PARTS BY WEIGHT OF MINERAL BASE OIL, (2) 50 TO 10 PARTS BY WEIGHT OF A MIXTURE OF POLYMERS ALL HAVING A MOLECULAR WEIGHT BELOW ABOUT 1500 AND SELECTED FROM THE GROUP CONSISTING OF HYDROGENATED AND NONHYDROGENATED POLYBUTENES AND POLYISOBUTYLENES, SAID MIXTURE COMPRISING A POLYMER HAVING A SAYBOLT VISCOSITY AT 210*F OF BETWEEN 150 AND 3,000 SSU AND A LOWER MOLECULAR WEIGHT POLYMER HAVING A SAYBOLT VISCOSITY AT 210*F OF BETWEEN 40 AND 100 SSU, THE HIGHER MOLECULAR WEIGHT AND LOWER MOLECULAR WEIGHT POLYMERS OF SAID MIXTURE BEING IN THE RATIO OF 4:1 TO 1:1, AND (3) SUPER-BASIC ADDITIVE, SAID LUBRICATING COMPOSITION HAVING AN ALKALINITY INDEX OF BETWEEN 60 AND 70.
Claim 2
Dependent Claim
123 words
A LUBRICATING COMPOSITION FOR MARINE DIESEL ENGINES COMPRISING (1) 50 TO 90 PARTS BY WEIGHT OF MINERAL BASE OIL, (2) 50 TO 10 PARTS BY WEIGHT OF A MIXTURE OF POLYMERS ALL HAVING A MOLECULAR WEIGHT BELOW ABOUT 1500 AND SELECTED FROM THE GROUP CONSISTING OF HYDROGENATED AND NONHYDROGENATED POLYBUTENES AND POLYISOBUTYLENES, SAID MIXTURE COMPRISING A POLYMER HAVING A SAYBOLT VISCOSITY AT 210*F OF BETWEEN 150 AND 3,000 SSU AND A LOWER MOLECULAR WEIGHT POLYMER HAVING A SAYBOLT VISCOSITY AT 210*F OF BETWEEN 40 AND 100 SSU, THE HIGHER MOLECULAR WEIGHT AND LOWER MOLECULAR WEIGHT POLYMERS OF SAID MIXTURE BEING IN THE RATIO OF 4:1 TO 1:1, AND (3) SUPER-BASIC ADDITIVE, SAID LUBRICATING COMPOSITION HAVING AN ALKALINITY INDEX OF BETWEEN 60 AND 70.
Claim 3
Dependent Claim
27 words
The lubricating composition of claim 1 wherein the mineral base oil is a naphthenic oil having a Saybolt viscosity at 100*F of between 50 and 1,000 SSU.
Claim 4
Dependent Claim
26 words
The lubricating composition of claim 1 wherein the said composition contains from 15 to 30% based on the weight of said composition, of said superbasic additive.
Claim 5
Dependent Claim
27 words
The lubricating composition of claim 1 wherein said composition comprises 65 to 80% of said mineral base oil and 35 to 20% of said mixture of polymers.
Claim 6
Dependent Claim
39 words
The lubricating composition of claim 1 containing about 15 to 30% based on the weight of said composition of a super basic additive selected from a group consisting of super basic sulfonates and phenates of an alkaline earth metal.
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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |