Patent US4313738A successfully refreshed from Google Patents.
US4313738A
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US
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Substituted dihydro oxazines as hydrocarbon antioxidants
Assignee: Phillips Petroleum Co
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Filing: 1980-04-14
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Granted: 1982-02-02
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Expires: 2000-04-14
Abstract
Abstract Hydrocarbon lube oil or hydrocarbon fuel for a combustion engine containing an amount of substituted dihydro oxazine sufficient to stabilize the hydrocarbon lube oil or hydrocarbon fuel against oxidative deterioration. A method for stabilizing either hydrocarbon lube oil or hydrocarbon fuel for a combustion engine against oxidative deterioration in which an oxidation stabilizing amount of substituted dihydro oxazine is added to the lube oil or the hydrocarbon fuel.
Inventors
- 👤 Robert M. Parlman
- 👤 Lyle D. Burns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:23
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/232; C10L1/233; C10M; C10M133/00; C10M133/02; C10M133/38; C10M133/48; C10M2215/00; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/30
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
42 words
A hydrocarbon composition suitable as a fuel for combustion engines comprising a hydrocarbon fuel and an amount of substituted dihydro oxazine in the range of about 1 weight percent to about 0.0001 weight percent sufficient to stabilize said fuel against oxidative deterioration.
Claim 2
Dependent Claim
42 words
A hydrocarbon composition suitable as a fuel for combustion engines comprising a hydrocarbon fuel and an amount of substituted dihydro oxazine in the range of about 1 weight percent to about 0.0001 weight percent sufficient to stabilize said fuel against oxidative deterioration.
Claim 3
Dependent Claim
72 words
A composition of claim 1 wherein said dihydro oxazine is represented by the formula ##STR2## wherein R is any saturated hydrocarbyl radical having from 1 to 18 carbon atoms and R 1 is hydrogen or R and wherein each R or R 1 is the same or different and wherein said substituted dihydro oxazine is present in the composition in a range of about 0.1 weight percent to about 0.0002 weight percent.
Claim 4
Independent Claim
44 words
A method for stabilizing a hydrocarbon fuel for combustion engines comprising admixing with said hydrocarbon fuel an amount of substituted dihydro oxazine in the range of about 1 weight percent to about 0.0001 weight percent sufficient to stabilize said hydrocarbon fuel against oxidative deterioration.
Claim 5
Independent Claim
44 words
A method for stabilizing a hydrocarbon fuel for combustion engines comprising admixing with said hydrocarbon fuel an amount of substituted dihydro oxazine in the range of about 1 weight percent to about 0.0001 weight percent sufficient to stabilize said hydrocarbon fuel against oxidative deterioration.
Claim 6
Dependent Claim
73 words
A method of claim 3 wherein said substituted dihydro oxazine is represented by the formula ##STR3## wherein R is any saturated hydrocarbyl radical having from 1 to 18 carbon atoms and R 1 is hydrogen or R and wherein each R or R 1 is the same or different and wherein said substituted dihydro oxazine is present in the composition in a range of about 0.1 weight percent to about 0.0002 weight percent.
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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) | 1985-02-01 | 1985-08-03 | 1986-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-01 | 1989-08-03 | 1990-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-01 | 1993-08-03 | 1994-02-02 | $7700.00 | Window Closed / Lapsed |