Patent US4148739A successfully refreshed from Google Patents.
US4148739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antioxidant additive composition and lubricating oil containing same
Assignee: Chevron USA Inc
•
Filing: 1978-03-31
•
Granted: 1979-04-10
•
Expires: 1998-03-31
Abstract
Abstract Disclosed is a lubricating oil additive composition which imparts improved oxidation properties to crankcase lubricants which comprises: (1) an antioxidant selected from aromatic or alkyl sulfides and polysulfides, sulfurized olefins, sulfurized carboxylic acid esters and sulfurized ester-olefins, and (2) an oil-soluble iodo-containing hydrocarbon. Lubricating oil compositions containing this additive composition are also disclosed.
Inventors
- 👤 Thomas V. Liston
- 👤 Warren Lowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:41
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; C10M2205/02; C10M2205/024; C10M2205/026; 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; C10M2211/00; C10M2211/02; C10M2211/022; C10M2211/06; C10M2211/08; 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; C10M2221/00; C10M2221/04; C10M2221/041; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/045; C10M2227/00; C10M2227/02; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/041; C10M2229/042; C10M2229/05; C10N; C10N2010/00; C10N2010/04; C10N2040/00; C10N2040/25; C10N2040/251; C10N2040/255; C10N2040/28; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
50 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 iodo-containing hydrocarbon wherein the weight ratio of said antioxidant to said iodo-containing hydrocarbon is 1:0.001-21.
Claim 2
Dependent Claim
50 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 iodo-containing hydrocarbon wherein the weight ratio of said antioxidant to said iodo-containing hydrocarbon is 1:0.001-21.
Claim 3
Dependent Claim
29 words
The composition of claim 1 comprising an oil of lubricating viscosity, from 0.25 to 10% weight of said antioxidant and from 0.001 to 5% weight of said iodo-containing hydrocarbon.
Claim 4
Dependent Claim
15 words
The composition of claim 2 wherein said iodo-containing hydrocarbon contains 5 to 30 carbon atoms.
Claim 5
Dependent Claim
11 words
The composition of claim 2 wherein said iodo-containing hydrocarbon is 1-iodoheptane.
Claim 6
Dependent Claim
12 words
The composition of claim 2 wherein said iodo-containing hydrocarbon is hexadecyl iodide.
Claim 7
Dependent Claim
26 words
A lubricating oil concentrate comprising from 90-10% by weight of an oil of lubricating viscosity and from 10-90% by weight of the composition of claim 1.
Claim 8
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 9
Dependent Claim
14 words
The composition of claim 7 wherein the antioxidant is a wax sulfide or polysulfide.
Claim 10
Dependent Claim
16 words
The composition of claim 7 which also contains an antioxidant-antiwear amount of an oil-soluble zinc salt.
Claim 11
Dependent Claim
13 words
The composition of claim 9 wherein the zinc salt is a zinc dihydrocarbyldithiophosphate.
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) | 1982-04-09 | 1982-10-09 | 1983-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-09 | 1986-10-09 | 1987-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-09 | 1990-10-09 | 1991-04-10 | $7700.00 | Window Closed / Lapsed |