Patent US5674752A successfully refreshed from Google Patents.
US5674752A
Expired / Lapsed
US
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Conductive polymer coated fabrics for chemical sensing
Assignee: NAVY DEPARTMENT OF United States,
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Filing: 1995-10-16
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Granted: 1997-10-07
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Expires: 2015-10-16
Abstract
Abstract A fabric chemical sensor, a process and an apparatus is disclosed. The sensor, process and apparatus are for the detection, classification, identification and/or quantitation of one or more component chemicals of a chemical vapor via a resistance measurment made across sensor in response to exposure of the sensor to the chemical vapor.
Inventors
- 👤 Leonard J. Buckley
- 👤 Greg Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:06
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/12; G01N27/125; G01N27/126; G01N33/00; G01N33/0004; G01N33/0009; G01N33/0027; G01N33/0031; G01N33/0036; G01N33/0047; Y; Y10; Y10S; Y10S436/00; Y10S436/902
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
170 words
A process for the detection of one or more component chemicals of a chemical vapor, said process comprising the steps of: (i) electrically connecting one or more fabric chemical sensors to a power source, said one or more fabric chemical sensors comprising one or more sensor elements, said sensor elements woven into a fabric of insulating fibers, said fibers being coated with one or more conductive polymers, each of said fabric chemical sensors having a baseline resistance; (ii) exposing at time=t 0 over said one or more fabric chemical sensors a chemical vapor, said chemical vapor comprising one or more component chemicals; (iii) detecting and quantifying a change in said baseline resistance of said one or more fabric chemical sensors at a later time=t 1 in response to exposure of said one or more fabric chemical sensors to said chemical vapor; and (iv) resolving and classifying from said change in said baseline resistance the identity of at least one of said one or more component chemicals of said chemical vapor.
Claim 2
Dependent Claim
170 words
A process for the detection of one or more component chemicals of a chemical vapor, said process comprising the steps of: (i) electrically connecting one or more fabric chemical sensors to a power source, said one or more fabric chemical sensors comprising one or more sensor elements, said sensor elements woven into a fabric of insulating fibers, said fibers being coated with one or more conductive polymers, each of said fabric chemical sensors having a baseline resistance; (ii) exposing at time=t 0 over said one or more fabric chemical sensors a chemical vapor, said chemical vapor comprising one or more component chemicals; (iii) detecting and quantifying a change in said baseline resistance of said one or more fabric chemical sensors at a later time=t 1 in response to exposure of said one or more fabric chemical sensors to said chemical vapor; and (iv) resolving and classifying from said change in said baseline resistance the identity of at least one of said one or more component chemicals of said chemical vapor.
Claim 3
Dependent Claim
47 words
The process of claim 1 wherein said power source is a direct current battery, wherein said insulating fiber is selected from the group consisting of PET, nylon and mixtures thereof, and wherein said conductive polymer is selected from the group consisting of poly(pyrrole), poly(aniline) and mixtures thereof.
Claim 4
Dependent Claim
29 words
The process of claim 1 wherein said detecting and quantifying is accomplished using an electrometer and wherein said resolving and classifying is accomplished using a means for data acquisition.
Claim 5
Dependent Claim
16 words
The process of claim 3 wherein said means for data acquisition is a data acquisition algorithm.
Claim 6
Dependent Claim
19 words
The process of claim 1 wherein said one or more conductive polymers are doped with one or more dopants.
Claim 7
Dependent Claim
27 words
The process of claim 5 wherein said one or more dopants are selected from the group consisting of PTSA, NDSA, N2SA, AQSA, chloride ion and mixtures thereof.
Claim 8
Dependent Claim
20 words
The process of claim 5 wherein said one or more conductive polymers are coated with one or more bilayer polymers.
Claim 9
Dependent Claim
26 words
The process of claim 7 wherein said one or more bilayer polymers are selected from the group consisting of PEI, PIB, SXFA, FPOL and mixtures thereof.
Claim 10
Independent Claim
181 words
An apparatus for the detection of one or more component chemicals of a chemical vapor, said apparatus comprising: (i) one or more fabric chemical sensors comprising one or more sensor elements, said one or more sensor elements being woven into a fabric of insulating fibers, said fibers being coated with one or more conductive polymers; (ii) a power supply being electrically connected to said one or more fabric chemical sensors, said one or more fabric chemical sensors having a measurable baseline resistance; (iii) a means for exposing a chemical vapor over said one or more fabric chemical sensors sufficient to measure a reproducible change in said baseline resistance, said chemical vapor further comprising one or more component chemicals; (iv) a means for detecting and quantifying said change in said baseline resistance in response to said exposure of said one or more fabric chemical sensors to said chemical vapor; and (v) a means for resolving from said change in said baseline resistance a classification of the identity of at least one of said one or more component chemicals of said chemical vapor.
Claim 11
Independent Claim
181 words
An apparatus for the detection of one or more component chemicals of a chemical vapor, said apparatus comprising: (i) one or more fabric chemical sensors comprising one or more sensor elements, said one or more sensor elements being woven into a fabric of insulating fibers, said fibers being coated with one or more conductive polymers; (ii) a power supply being electrically connected to said one or more fabric chemical sensors, said one or more fabric chemical sensors having a measurable baseline resistance; (iii) a means for exposing a chemical vapor over said one or more fabric chemical sensors sufficient to measure a reproducible change in said baseline resistance, said chemical vapor further comprising one or more component chemicals; (iv) a means for detecting and quantifying said change in said baseline resistance in response to said exposure of said one or more fabric chemical sensors to said chemical vapor; and (v) a means for resolving from said change in said baseline resistance a classification of the identity of at least one of said one or more component chemicals of said chemical vapor.
Claim 12
Dependent Claim
19 words
The apparatus of claim 9 wherein said one or more conductive polymers are doped with one or more dopants.
Claim 13
Dependent Claim
27 words
The apparatus of claim 10 wherein said one or more dopants are selected from the group consisting of PTSA, NDSA, N2SA, AQSA, chloride ion and mixtures thereof.
Claim 14
Dependent Claim
20 words
The apparatus of claim 10 wherein said one or more conductive polymers are coated with one or more bilayer polymers.
Claim 15
Dependent Claim
26 words
The apparatus of claim 12 wherein said one or more bilayer polymers are selected from the group consisting of PEI, PIB, SXFA, FPOL and mixtures thereof.
Claim 16
Dependent Claim
21 words
The apparatus of claim 9 wherein said insulating fibers are selected from the group consisting of PET, nylon and mixtures thereof.
Claim 17
Dependent Claim
21 words
The apparatus of claim 14 wherein said conductive polymers are selected from the group consisting of poly(pyrrole), poly(aniline) and mixtures thereof.
Claim 18
Dependent Claim
14 words
The apparatus of claim 15 wherein said power supply is a direct current battery.
Claim 19
Dependent Claim
21 words
The apparatus of claim 16 wherein said means for exposing is one or more fabric chemical sensors exposed to ambient atmosphere.
Claim 20
Dependent Claim
15 words
The apparatus of claim 17 wherein said means for detecting and quantifying is an electrometer.
Claim 21
Dependent Claim
15 words
The apparatus of claim 18 wherein said means for resolving is an artificial neural network.
Claim 22
Dependent Claim
15 words
The apparatus of claim 18 wherein said means for resolving is a pattern selectivity algorithm.
Claim 23
Dependent Claim
16 words
The apparatus of claim 18 wherein said means for resolving is a means for data acquisition.
Claim 24
Dependent Claim
16 words
The apparatus of claim 21 wherein said means for data acquisition is a data acquisition algorithm.
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) | 2000-10-06 | 2001-04-07 | 2001-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-10-06 | 2005-04-07 | 2005-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-10-06 | 2009-04-07 | 2009-10-07 | $7700.00 | Window Closed / Lapsed |