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US4177153A
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Lubricating oil additive composition
Assignee: Chevron USA Inc
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Filing: 1978-03-31
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Granted: 1979-12-04
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Expires: 1998-03-31
Abstract
Abstract A lubricating oil additive composition which imparts improved oxidation properties to crankcase lubricants comprises an antioxidant selected from aromatic or alkyl sulfides and polysulfides, sulfurized olefins, sulfurized carboxylic acid esters and sulfurized ester-olefins, and a tertiary amine of the formula (R) 3 N wherein each R is independently C 1 -C 35 alkyl and at least one R contains at least 11 carbon atoms. Lubricating oil compositions containing this additive composition are also disclosed.
Inventors
- 👤 Warren Lowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:23
CPC Classifications
C; C10; C10M; C10M141/00; C10M141/08; C10M141/10; C10M2201/00; C10M2201/08; C10M2201/082; C10M2201/083; C10M2203/00; C10M2203/06; C10M2205/00; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/027; C10M2207/04; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/129; C10M2207/22; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/108; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/086; C10M2215/24; C10M2215/26; C10M2215/28; C10M2217/00; C10M2217/04; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/02; C10M2219/022; C10M2219/024; C10M2219/04; C10M2219/044; C10M2219/08; C10M2219/082; C10M2219/083; C10M2219/085; C10M2219/086; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/045; C10M2227/00; C10M2227/02; C10M2229/00; C10M2229/04; C10M2229/041; C10M2229/042; C10N; C10N2010/00; C10N2010/04; C10N2040/00; C10N2040/25; C10N2040/251; C10N2040/255; C10N2040/28
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
77 words
An additive composition for use in crankcase lubricating oils comprising: (1) an oil-soluble antioxidant selected from aromatic or alkyl sulfides and polysulfides, sulfurized olefins, sulfurized carboxylic acid esters, and sulfurized ester-olefins, and (2) an oil-soluble tertiary amine of the formula (R) 3 N, wherein each R is independently C 1 -C 35 alkyl and at least one R contains at least 11 carbon atoms, wherein the weight ratio of said antioxidant to said tertiary amine is 1:0.001-21.
Claim 2
Dependent Claim
77 words
An additive composition for use in crankcase lubricating oils comprising: (1) an oil-soluble antioxidant selected from aromatic or alkyl sulfides and polysulfides, sulfurized olefins, sulfurized carboxylic acid esters, and sulfurized ester-olefins, and (2) an oil-soluble tertiary amine of the formula (R) 3 N, wherein each R is independently C 1 -C 35 alkyl and at least one R contains at least 11 carbon atoms, wherein the weight ratio of said antioxidant to said tertiary amine is 1:0.001-21.
Claim 3
Dependent Claim
17 words
The composition of claim 1 wherein at least one R is a C 11 -C 25 .
Claim 4
Dependent Claim
20 words
A lubricating oil composition comprising an oil of lubricating viscosity and an antioxidant amount of the composition of claim 1.
Claim 5
Dependent Claim
29 words
The composition of claim 3 comprising an oil of lubricating viscosity, from 0.25 to 10% weight of said antioxidant, and from 0.001 to 5% weight of said tertiary amine.
Claim 6
Dependent Claim
16 words
The composition of claim 4 which also contains an antioxidant-antiwear amount of an oil-soluble zinc salt.
Claim 7
Dependent Claim
45 words
The composition of claim 5 which contains from 2 to 40 mmols of zinc per kilogram of composition, present as said oil-soluble zinc salt, from 0.25 to 2% weight of a paraffin wax thiomer, antioxidant and from 0.01 to 0.3% weight of said tertiary amine.
Claim 8
Dependent Claim
13 words
The composition of claim 6 wherein said zinc salt is zinc dihydrocarbyl dithiophosphate.
Claim 9
Dependent Claim
26 words
A lubricating oil additive concentrate which comprises from 90-10% weight of an oil of lubricating viscosity and from 10-90% weight of the composition of claim 1.
Claim 10
Dependent Claim
89 words
A method for preparing the lubricating oil composition of claim 4 which comprises admixing an oil of lubricating viscosity with (1) an oil-soluble antioxidant selected from aromatic or alkyl sulfides and polysulfides, sulfurized olefins, sulfurized carboxylic acid esters and sulfurized ester-olefins, and and (2) an oil-soluble tertiary amine of the formula (R) 3 N, wherein each R is independently C 1 -C 35 alkyl and at least one R contains at least 11 carbon atoms, and wherein the weight ratio of said antioxidant to said tertiary amine is 1:0.001-21.
Claim 11
Independent Claim
83 words
A method for inhibiting the oxidation of a lubricating oil which comprises adding to said lubricating oil from 0.25 to 10% weight of (1) an oil-soluble antioxidant selected from aromatic or alkyl sulfides and polysulfides, sulfurized olefins, sulfurized carboxylic acid esters and sulfurized ester-olefins, and from 0.001 to 5% weight of (2) an oil-soluble tertiary amine of the formula (R) 3 N, wherein each R is independently C 1 -C 35 alkyl and at least one R contains at least 11 carbon atoms.
Claim 12
Independent Claim
83 words
A method for inhibiting the oxidation of a lubricating oil which comprises adding to said lubricating oil from 0.25 to 10% weight of (1) an oil-soluble antioxidant selected from aromatic or alkyl sulfides and polysulfides, sulfurized olefins, sulfurized carboxylic acid esters and sulfurized ester-olefins, and from 0.001 to 5% weight of (2) an oil-soluble tertiary amine of the formula (R) 3 N, wherein each R is independently C 1 -C 35 alkyl and at least one R contains at least 11 carbon atoms.
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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) | 1982-12-03 | 1983-06-04 | 1983-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-03 | 1987-06-04 | 1987-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-03 | 1991-06-04 | 1991-12-04 | $7700.00 | Window Closed / Lapsed |