US5018380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dielectric sensors
Assignee: Honeywell International Inc
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Filing: 1989-02-06
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Granted: 1991-05-28
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Expires: 2009-02-06
Abstract
Abstract The amount of carbon monoxide or oxygen in a gas is measured by determining the change in dielectric properties of a polymer film disposed between two electrodes. A preferred polymer film comprises an organometallic gas carrier interdispersed within an interpenetrating polymer network matrix.
Inventors
- 👤 Joseph J. Zupancic
- 👤 Sandra L. Petty-Weeks
- 👤 Anthony J. Polak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:10
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/22; G01N27/227
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
79 words
A method of measuring the amount of carbon monoxide or oxygen in a gas comprising: (a) contacting said gas with a film consisting essentially of an organometallic gas carrier dispersed within an interpenetrating polymer network in contact with electrodes having a means for measuring the dielectric properties of said polymer film; (b) measuring the dielectric properties of said polymer film; and, (c) correlating the measured dielectric properties with the amount of carbon monoxide or oxygen present in said gas.
Claim 2
Independent Claim
79 words
A method of measuring the amount of carbon monoxide or oxygen in a gas comprising: (a) contacting said gas with a film consisting essentially of an organometallic gas carrier dispersed within an interpenetrating polymer network in contact with electrodes having a means for measuring the dielectric properties of said polymer film; (b) measuring the dielectric properties of said polymer film; and, (c) correlating the measured dielectric properties with the amount of carbon monoxide or oxygen present in said gas.
Claim 3
Dependent Claim
29 words
The method of claim 1 wherein the effect of ambient humidity on the dielectric properties of said polymer is measured and separated from the dielectric properties measured in (b).
Claim 4
Dependent Claim
23 words
The method of claim 2 wherein said interpenetrating polymer network matrix comprises (1) an isocyanate-capped polymer physically entwined with (2) a nitrogen-containing polymer.
Claim 5
Dependent Claim
27 words
The method of claim 1 wherein said organometallic gas carrier comprises an organic compound selected from the group consisting of porphyrins, phthalocyanines, derivatives thereof, and phosphorus complexes.
Claim 6
Dependent Claim
27 words
The method of claim 4 wherein the metallic portion of said organometallic gas carrier is selected from the group consisting of cobalt, iron, manganese, iridium, and rhodium.
Claim 7
Dependent Claim
16 words
The method of claim 5 wherein the metallic portion of said organometallic gas carrier is cobalt.
Claim 8
Dependent Claim
20 words
The method of claim 1 wherein said organometallic gas carrier is 0.001 to 0.70 wt. percent of said polymer film.
Claim 9
Dependent Claim
11 words
The method of claim 1 wherein the electrodes are interdigitated electrodes.
Claim 10
Dependent Claim
86 words
A sensor for detecting and measuring the amount of carbon monoxide or oxygen in a gas comprising: (a) a polymer film disposed in a porous support, said film comprising an organometallic gas carrier dispersed within an interpenetrating polymer network; (b) two electrodes in contact with the polymer film; (c) means for measuring the dielectric properties of said polymer film of (a) between said electrodes of (b); (d) means for correlating the measured dielectric properties with the amount of carbon monoxide or oxygen present in said gas.
Claim 11
Dependent Claim
86 words
A sensor for detecting and measuring the amount of carbon monoxide or oxygen in a gas comprising: (a) a polymer film disposed in a porous support, said film comprising an organometallic gas carrier dispersed within an interpenetrating polymer network; (b) two electrodes in contact with the polymer film; (c) means for measuring the dielectric properties of said polymer film of (a) between said electrodes of (b); (d) means for correlating the measured dielectric properties with the amount of carbon monoxide or oxygen present in said gas.
Claim 12
Dependent Claim
22 words
The sensor of claim 9 wherein said interpenetrating polymer network comprises: (1) an isocyanate-capped polymer physically entwined with (2) a nitrogen-containing polymer.
Claim 13
Dependent Claim
27 words
The sensor of claim 9 wherein said organometallic gas carrier comprises an organic compound selected from the group consisting of porphyrins, phthalocyanines, derivatives thereof, and phosphorous complexes.
Claim 14
Dependent Claim
27 words
The sensor of claim 9 wherein the metallic portion of said organometallic gas carrier is selected from the group consisting of cobalt, iron, manganese, iridium, and rhodium.
Claim 15
Dependent Claim
16 words
The sensor of claim 12 wherein the metallic portion of said organometallic gas carrier is cobalt.
Claim 16
Dependent Claim
20 words
The sensor of claim 9 wherein said organometallic gas sensor is 0.001 to 0.70 wt. percent of said polymer film.
Claim 17
Dependent Claim
11 words
The sensor of claim 9 wherein the electrodes are interdigitated electrodes.
References Cited (Backward Citations)
US4238758A
Cited
US4198851A
Cited
US4453126A
Cited
US4642601A
Cited
US4442422A
Cited
US4563893A
Cited
US4564882A
Cited
US4603372A
Cited
US4627859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-05-27 | 1994-11-26 | 1995-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-27 | 1998-11-26 | 1999-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-27 | 2002-11-26 | 2003-05-28 | $7700.00 | Window Closed / Lapsed |