Patent US4141692A successfully refreshed from Google Patents.
US4141692A
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Tagged fuel compositions
Assignee: Union Oil Company of California
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Filing: 1977-01-19
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Granted: 1979-02-27
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Expires: 1997-01-19
Abstract
Abstract Liquid fuels of readily identifiable origin contain extremely small quantities of certain types of chlorohydrocarbon or chlorocarbon tracers dissolved therein. The presence of such tracers is readily detected by gas chromatography, using a pulsed electron capture detector.
Inventors
- 👤 James L. Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:55
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/003; C10L1/10; C10L1/14; C10L1/20; C10L1/201
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
95 words
A liquid hydrocarbon fuel composition containing dissolved therein at least about 0.01 but no more than about 10 mg/l of a chlorinated hydrocarbon component consisting essentially of at least one chlorohydrocarbon or chlorocarbon containing at least 3 chlorine atoms and at least 2 carbon atoms per molecule, and having a Cl/C atomic ratio of at least 1/3, said chlorinated hydrocarbon component being further selected to give an electron capture detector gas chromatogram peak distinguishable from the chromatogram peaks produced by all other components of said fuel, thereby forming a readily detectable tracer for said fuel.
Claim 2
Dependent Claim
95 words
A liquid hydrocarbon fuel composition containing dissolved therein at least about 0.01 but no more than about 10 mg/l of a chlorinated hydrocarbon component consisting essentially of at least one chlorohydrocarbon or chlorocarbon containing at least 3 chlorine atoms and at least 2 carbon atoms per molecule, and having a Cl/C atomic ratio of at least 1/3, said chlorinated hydrocarbon component being further selected to give an electron capture detector gas chromatogram peak distinguishable from the chromatogram peaks produced by all other components of said fuel, thereby forming a readily detectable tracer for said fuel.
Claim 3
Dependent Claim
14 words
A composition as defined in claim 1 wherein said fuel is an unleaded gasoline.
Claim 4
Dependent Claim
24 words
A composition as defined in claim 1 wherein said fuel is a leaded gasoline containing ethylene dichloride and/or ethylene dibromide as a lead scavenger.
Claim 5
Dependent Claim
19 words
A composition as defined in claim 1 wherein said fuel contains about 0.2-4 mg/l of said chlorinated hydrocarbon component.
Claim 6
Dependent Claim
15 words
A composition as defined in claim 1 wherein said chlorinated hydrocarbon component comprises tetrachloro ethylene.
Claim 7
Dependent Claim
22 words
A composition as defined in claim 1 wherein said chlorinated hydrocarbon component comprises 2 or more chlorohydrocarbons and/or chlorocarbons as defined therein.
Claim 8
Dependent Claim
29 words
A composition as defined in claim 1 wherein said chlorinated hydrocarbon component has a boiling point above or within the top 3/4 of the boiling range of said fuel.
Claim 9
Dependent Claim
114 words
A liquid hydrocarbon fuel composition containing dissolved therein at least about 0.01 but no more than about 10 mg/l of a chlorinated hydrocarbon component consisting essentially of at least one chlorohydrocarbon or chlorocarbon having from 3 to about 8 chlorine atoms and 2- 10 carbon atoms per molecule, and having a Cl/C atomic ratio between 0.5 and 3, at least 2 of said chlorine atoms per molecule being bonded to the same or adjacent carbon atoms, said chlorinated hydrocarbon component being further selected to give an electron capture detector gas chromatogram peak distinguishable from the chromatogram peaks produced by all other components of said fuel, thereby forming a readily detectable tracer for said fuel.
Claim 10
Dependent Claim
114 words
A liquid hydrocarbon fuel composition containing dissolved therein at least about 0.01 but no more than about 10 mg/l of a chlorinated hydrocarbon component consisting essentially of at least one chlorohydrocarbon or chlorocarbon having from 3 to about 8 chlorine atoms and 2- 10 carbon atoms per molecule, and having a Cl/C atomic ratio between 0.5 and 3, at least 2 of said chlorine atoms per molecule being bonded to the same or adjacent carbon atoms, said chlorinated hydrocarbon component being further selected to give an electron capture detector gas chromatogram peak distinguishable from the chromatogram peaks produced by all other components of said fuel, thereby forming a readily detectable tracer for said fuel.
Claim 11
Dependent Claim
14 words
A composition as defined in claim 8 wherein said fuel is an unleaded gasoline.
Claim 12
Dependent Claim
24 words
A composition as defined in claim 8 wherein said fuel is a leaded gasoline containing ethylene dichloride and/or ethylene dibromide as a lead scavenger.
Claim 13
Dependent Claim
19 words
A composition as defined in claim 8 wherein said fuel contains about 0.2-4 mg/l of said chlorinated hydrocarbon component.
Claim 14
Dependent Claim
14 words
A composition as defined in claim 8 wherein said tracer component comprises tetrachloro ethylene.
Claim 15
Dependent Claim
22 words
A composition as defined in claim 8 wherein said chlorinated hydrocarbon component comprises 2 or more chlorohydrocarbons and/or chlorocarbons as defined therein.
Claim 16
Dependent Claim
29 words
A composition as defined in claim 8 wherein said chlorinated hydrocarbon component has a boiling point above or within the top 3/4 of the boiling range of said fuel.
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) | 1982-02-26 | 1982-08-28 | 1983-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-26 | 1986-08-28 | 1987-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-26 | 1990-08-28 | 1991-02-27 | $7700.00 | Window Closed / Lapsed |