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US4520109A
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Fluorocarbon tracers and tracing method
Assignee: Adamantech Inc
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Filing: 1983-03-14
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Granted: 1985-05-28
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Expires: 2003-03-14
Abstract
Abstract A material is traced to its origin or the flow pattern of a fluid medium is defined by incorporating into the material or fluid medium a perfluorinated C9-C18 polycyclic hydrocarbon containing at least two bridgehead carbon atoms linked through a bridge containing at least one carbon atom, collecting a sample of the material or fluid medium after distribution or flow, and analyzing the sample for the presence of the perfluoro compound.
Inventors
- 👤 Peter G. Simmonds
- 👤 Robert E. Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:48
CPC Classifications
A; A61; A61K; A61K51/00; A61K51/12; A61K51/121; A61K51/02; A61K51/04; C; C07; C07C; C07C23/00; C07C23/18; C07C23/20; C07C23/38; E; E21; E21B; E21B47/00; E21B47/10; E21B47/11; G; G01; G01N; G01N33/00; G01N33/26; G01N33/28; G01N33/2835; G01N33/2882; A61K2123/00; Y; Y10; Y10T; Y10T436/00; Y10T436/13; Y10T436/19; Y10T436/196666
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
103 words
A tracing method comprising the steps of (1) incorporating a tracer compound into a material or a fluid medium in order to identify the source or distribution of the material or to define the flow pattern of the medium, (2) permitting distribution of the material or flow of the fluid medium, (3) collecting a sample of the material or fluid medium, and (4) analyzing the sample for the presence of the tracer compound, wherein said tracer compound is a perfluorinated C 9 -C 18 polycyclic hydrocarbon containing at least two bridgehead carbon atoms linked through a bridge containing at least one carbon atom.
Claim 2
Dependent Claim
103 words
A tracing method comprising the steps of (1) incorporating a tracer compound into a material or a fluid medium in order to identify the source or distribution of the material or to define the flow pattern of the medium, (2) permitting distribution of the material or flow of the fluid medium, (3) collecting a sample of the material or fluid medium, and (4) analyzing the sample for the presence of the tracer compound, wherein said tracer compound is a perfluorinated C 9 -C 18 polycyclic hydrocarbon containing at least two bridgehead carbon atoms linked through a bridge containing at least one carbon atom.
Claim 3
Dependent Claim
12 words
The tracing method of claim 1 wherein the tracer compound is F-dimethyladamantane.
Claim 4
Dependent Claim
15 words
The tracing method of claim 1 wherein the tracer compound is F-tricyclo[5.2.1.0. 2 ,6 ]decane.
Claim 5
Dependent Claim
12 words
The tracing method of claim 1 wherein the tracer compound is F-1-methyladamantane.
Claim 6
Dependent Claim
24 words
The tracing method of claim 1 wherein the tracer compound is a mixture of the exo and endo isomers of F-tricyclo[5.2.1.0. 2 ,6 ]decane.
Claim 7
Dependent Claim
15 words
The tracing method of claim 1 wherein the tracer compound is 1-hydropentadecafluorotricyclo[5.2.1.0. 2 ,6 ]decane.
Claim 8
Dependent Claim
19 words
The tracing method of claim 1 wherein the sample in step (4) is analyzed by electron capture gas chromatography.
Claim 9
Dependent Claim
18 words
The tracing method of claim 1 wherein the sample is catalytically treated prior to analysis to remove contaminants.
Claim 10
Dependent Claim
19 words
The tracing method of claim 1 wherein the tracer compound is a mixture of an F-alkyladamantane and an F-alkylbicyclononane.
Claim 11
Dependent Claim
16 words
The tracing method of claim 9 wherein the F-alkyladamantane is F-dimethyladamantane and the F-alkylbicyclononane is F-trimethylbicyclononane.
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) | 1988-05-27 | 1988-11-26 | 1989-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-27 | 1992-11-26 | 1993-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-27 | 1996-11-26 | 1997-05-28 | $7700.00 | Window Closed / Lapsed |