Patent US4178258A successfully refreshed from Google Patents.
US4178258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil composition
Assignee: Edwin Cooper Inc
•
Filing: 1978-05-18
•
Granted: 1979-12-11
•
Expires: 1998-05-18
Abstract
Abstract Lubricating oil adapted for use in spark ignited and diesel engines containing an antiwear amount of a molybdenum bis(dialkyldithiocarbamate).
Inventors
- 👤 Andrew G. Papay
- 👤 Edward F. Zaweski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:35
CPC Classifications
C; C10; C10M; C10M135/00; C10M135/12; C10M135/14; C10M135/18; C10M141/00; C10M141/10; C10M2203/00; C10M2203/06; C10M2205/00; C10M2205/02; C10M2205/028; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/024; C10M2207/027; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/24; C10M2215/26; C10M2217/00; C10M2217/04; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/04; C10M2219/046; C10M2219/06; C10M2219/062; C10M2219/066; C10M2219/068; C10M2219/08; C10M2219/082; C10M2219/087; C10M2219/088; C10M2219/089; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2225/00; C10M2225/04; C10M2225/041; C10N; C10N2010/00; C10N2010/04; C10N2010/12; F; F02; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
38 words
A lubricating oil composition suitable for use in the crankcase of an internal combustion engine, said composition comprising a major amount of mineral oil and a minor wear and friction reducing amount of an oil soluble molybdenum bis(dialkyldithiocarbamate).
Claim 2
Dependent Claim
38 words
A lubricating oil composition suitable for use in the crankcase of an internal combustion engine, said composition comprising a major amount of mineral oil and a minor wear and friction reducing amount of an oil soluble molybdenum bis(dialkyldithiocarbamate).
Claim 3
Dependent Claim
19 words
A lubricating oil composition of claim 1 wherein the alkyl groups of said dialkyldithiocarbamate contain about 4-20 carbon atoms.
Claim 4
Dependent Claim
13 words
A lubricating oil composition of claim 2 wherein said dialkyldithiocarbamate is molybdenum bis(didodecyldithiocarbamate).
Claim 5
Dependent Claim
13 words
A lubricating oil composition of claim 2 wherein said dialkyldithiocarbamate is molybdenum bis[di(2-ethylhexyl)dithiocarbamate].
Claim 6
Dependent Claim
57 words
A lubricating oil composition of claim 1 containing an antioxidant amount of an oil soluble zinc dihydrocarbyldithiophosphate which tends to increase engine wear due to blow-by carbon soot in diesel engines and a wear inhibiting amount of an oil soluble molybdenum bis(dialkyldithiocarbamate) which functions to counteract increased engine wear due to said zinc dihydrocarbyldithiophosphate and carbon soot.
Claim 7
Dependent Claim
19 words
A lubricating oil composition of claim 5 wherein the alkyl groups of said dialkyldithiocarbamate contain about 4-20 carbon atoms.
Claim 8
Dependent Claim
14 words
A lubricating oil composition of claim 6 wherein said molybdenum bis(dialkyldithiocarbamate) is molybdenum bis(didodecyldithiocarbamate).
Claim 9
Dependent Claim
14 words
A lubricating oil composition of claim 6 wherein said molybdenum bis(dialkyldithiocarbamate) is molybdenum bis[di(2-ethylhexyl)dithiocarbamate].
Claim 10
Dependent Claim
25 words
A lubricating oil composition of claim 6 wherein said zinc dihydrocarbyl dithiophosphate is a zinc dialkyldithiophosphate wherein the alkyl groups contain about 3-20 carbon atoms.
Claim 11
Dependent Claim
24 words
A lubricating oil composition of claim 9 wherein the alkyl groups in said zinc dialkyldithiophosphate are a mixture of isobutyl and amyl alkyl groups.
Claim 12
Dependent Claim
18 words
A lubricating oil composition of claim 9 wherein the alkyl groups in said zinc dialkyldithiophosphate are 2-ethylhexyl groups.
Claim 13
Dependent Claim
17 words
A lubricating oil composition of claims 10 or 11 wherein said molybdenum bis dialkyldithiocarbamate is molybdenum bis(didodecyldithiocarbamate).
Claim 14
Dependent Claim
16 words
A lubricating oil composition of claims 10 or 11 wherein said molybdenum bis(dialkyldithiocarbamate) is molybdenum bis[di(2-ethyhexyl)dithiocarbamate].
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) | 1982-12-10 | 1983-06-11 | 1983-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-10 | 1987-06-11 | 1987-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-10 | 1991-06-11 | 1991-12-11 | $7700.00 | Window Closed / Lapsed |