US4367152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selected heteroaromatic nitrogen compounds as antioxidant/metal deactivators/electrical insulators in lubricating oils and petroleum liquid fuels
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1981-07-02
•
Granted: 1983-01-04
•
Expires: 2001-07-02
Abstract
Abstract A hydrocarbon composition such as a lubricating or specialty oil containing a selected heteroaromatic nitrogen compound as an antioxidant/metal deactivator/electrical insulator having the following general formula: ##STR1## wherein each X is C or N with at least one X being N; Y is C or N; R is H or CH 2 NR"' 2 where each R" is H or alkyl of 1 to 20 carbons; R' is H, SR"' OR "' or NR"' 2 with each R"' being H or alkyl of 1 to 20 carbons.
Inventors
- 👤 Peter G. Wright
- 👤 John M. Macdonald
- 👤 Gerald A. MacAlpine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:16
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/232; C10L1/24; C10L1/2443; C10M; C10M133/00; C10M133/02; C10M133/38; C10M133/44; C10M135/00; C10M135/32; H; H01; H01B; H01B3/00; H01B3/18; H01B3/20; H01B3/22; C10M2215/00; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/30; C10M2219/00; C10M2219/09; C10N; C10N2040/00; C10N2040/14; C10N2040/16; C10N2040/17
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
89 words
A hydrocarbon composition comprising a basestock of hydrocarbon oil of lubricating viscosity or a petroleum liquid fuel and effective inhibitor amount of an antioxidant/metal deactivator/electrical insulator of the formula: ##STR3## wherein each X is C or N with at least one X being N; Y is C or N; R is H or CH 2 NR" 2 where each R" is H or alkyl of 1 to 20 carbons; R' is H, SR'", OR'" or NR'" 2 with each R'" being H or alkyl of 1 to 20 carbons.
Claim 2
Dependent Claim
89 words
A hydrocarbon composition comprising a basestock of hydrocarbon oil of lubricating viscosity or a petroleum liquid fuel and effective inhibitor amount of an antioxidant/metal deactivator/electrical insulator of the formula: ##STR3## wherein each X is C or N with at least one X being N; Y is C or N; R is H or CH 2 NR" 2 where each R" is H or alkyl of 1 to 20 carbons; R' is H, SR'", OR'" or NR'" 2 with each R'" being H or alkyl of 1 to 20 carbons.
Claim 3
Dependent Claim
33 words
The composition of claim 1 wherein said antioxidant/metal deactivator/electrical insulator is used in an amount of from about 0.0001 to about 1.0 percent by weight based on the total weight of the composition.
Claim 4
Dependent Claim
11 words
The composition of claim 2 wherein both X groups are N.
Claim 5
Dependent Claim
9 words
The composition of claim 3 wherein Y is C.
Claim 6
Dependent Claim
12 words
The composition of claim 4 wherein said basestock is a mineral oil.
Claim 7
Dependent Claim
24 words
The composition of claim 5 wherein said composition is an electrical insulating oil additionally containing a small additive amount of 2,6-ditertiary butyl para cresol.
Claim 8
Dependent Claim
25 words
The composition of claim 5 wherein said antioxidant/metal deactivator/electrical insulator is used in an amount of from about 0.001 to about 0.05 percent by weight.
Claim 9
Dependent Claim
19 words
The composition of claim 6 wherein the alkyl groups in R" and R'" contain 8 to 16 carbon atoms.
Claim 10
Dependent Claim
29 words
The composition of claim 2 wherein said antioxidant/metal deactivator/electrical insulator is selected from the group consisting of purine, 6-aminopurine, 4-azabenzimidazole, 8-azaadenine, 6-octylthiopurine, 6-decylthiopurine, 9-diethylaminomethylpurine, 9-dibutylaminomethylpurine, 9-dioctylaminomethyl purine and 9-didodecylaminomethylpurine.
Claim 11
Dependent Claim
32 words
The composition of claim 8 wherein said basestock is a mineral oil and said antioxidant/metal deactivator/electrical insulator is used in an amount of from about 0.001 to about 0.05 percent by weight.
Claim 12
Dependent Claim
24 words
The composition of claim 9 wherein said composition is an electrical insulating oil additionally containing a small additive amount of 2,6-ditertiary butyl para cresol.
References Cited (Backward Citations)
US1768910A
Cited
US2136788A
Cited
US2377423A
Cited
US2647824A
Cited
US3190835A
Cited
US3197475A
Cited
US3591500A
Cited
US3597353A
Cited
US3720616A
Cited
US3920678A
Cited
US3987054A
Cited
US3785977A
Cited
US3969237A
Cited
US4162225A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-03 | 1986-07-05 | 1987-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-03 | 1990-07-05 | 1991-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-03 | 1994-07-05 | 1995-01-04 | $7700.00 | Window Closed / Lapsed |