US4333810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Analyzer for chemical oxidizing or reducing agents
Assignee: Dow Chemical Co
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Filing: 1980-04-11
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Granted: 1982-06-08
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Expires: 2000-04-11
Abstract
Abstract An analyzer for the quantitative determination of a chemical oxidizing or reducing agent in a fluid environment. The analyzer includes a novel type of sensor or detector comprising a first electrode exposed to the fluid environment; a second electrode in contact with a solution of electrolyte; and an ion-exchange membrane to contain the electrolyte solution, and to separate the second electrode from the fluid environment and the first electrode.
Inventors
- 👤 Duane K. Wolcott
- 👤 John B. Carraway, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:43
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/404; G01N27/4045; G01N33/00; G01N33/0004; G01N33/0009; G01N33/0027; G01N33/0036; G01N33/0052
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
101 words
An instrument for quantitatively determining the concentration of chemical oxidizing and reducing agents in a gaseous environment, comprising: a first electrode exposed to said gaseous environment; a second electrode; an electrolyte solution; an ion-exchange membrane adapted to contain said electrolyte solution; and means for measuring a flow of electrical current generated between said first and second electrodes, said second electrode in contact with said electrolyte solution, said ion-exchange membrane separating said electrolyte solution and second electrode from said first electrode, said first electrode in electrical contact with said ion-exchange membrane thereby completing an electrochemical couple between said first and second electrodes.
Claim 2
Dependent Claim
101 words
An instrument for quantitatively determining the concentration of chemical oxidizing and reducing agents in a gaseous environment, comprising: a first electrode exposed to said gaseous environment; a second electrode; an electrolyte solution; an ion-exchange membrane adapted to contain said electrolyte solution; and means for measuring a flow of electrical current generated between said first and second electrodes, said second electrode in contact with said electrolyte solution, said ion-exchange membrane separating said electrolyte solution and second electrode from said first electrode, said first electrode in electrical contact with said ion-exchange membrane thereby completing an electrochemical couple between said first and second electrodes.
Claim 3
Dependent Claim
16 words
The instrument of claim 1 wherein said first and second electrodes are formed from dissimilar metals.
Claim 4
Dependent Claim
32 words
The instrument of claim 2 wherein said ion-exchange membrane is a cation-exchange membrane, whereby said instrument is adapted to quantitatively determine the concentration of a chemical oxidizing agent in the gaseous environment.
Claim 5
Dependent Claim
23 words
The instrument of claim 3 wherein said cation-exchange membrane is formed from a material having a polytetrafluoroethylene backbone and perfluorinated two-carbon sulfonated sidechains.
Claim 6
Dependent Claim
32 words
The instrument of claim 2 wherein said ion-exchange membrane is an anion-exchange membrane, whereby said instrument is adapted to quantitatively determine the concentration of a chemical reducing agent in the gaseous environment.
Claim 7
Dependent Claim
18 words
The instrument of claim 5 wherein said anion-exchange membrane is formed from a styrene-divinylbenzene copolymer having quaternary-ammonium sidechains.
Claim 8
Dependent Claim
40 words
The instrument of claim 1 wherein said first and second electrodes are formed from the same metal, and said instrument includes a means for imposing a voltage across and flow of direct electrical current between said first and second electrodes.
Claim 9
Dependent Claim
32 words
The instrument of claim 7 wherein said ion-exchange membrane is a cation-exchange membrane, whereby said instrument is adapted to quantitatively determine the concentration of a chemical oxidizing agent in the gaseous environment.
Claim 10
Dependent Claim
23 words
The instrument of claim 8 wherein said cation-exchange membrane is formed from a material having a polytetrafluoroethylene backbone and perfluorinated two-carbon sulfonated sidechains.
Claim 11
Dependent Claim
32 words
The instrument of claim 7 wherein said ion-exchange membrane in an anion-exchange membrane, whereby said instrument is adapted to quantitatively determine the concentration of a chemical reducing agent in the gaseous environment.
Claim 12
Dependent Claim
18 words
The instrument of claim 10 wherein said anion-exchange membrane is formed from a styrene-divinylbenzene copolymer having quaternary-ammonium sidechains.
Claim 13
Dependent Claim
28 words
The instrument of claim 2 wherein said instrument includes a means for imposing a voltage across and flow of direct electrical current between said first and second electrodes.
Claim 14
Dependent Claim
32 words
The instrument of claim 12 wherein said ion-exchange membrane is a cation-exchange membrane, whereby said instrument is adapted to quantitatively determine the concentration of a chemical oxidizing agent in the gaseous environment.
Claim 15
Dependent Claim
23 words
The instrument of claim 13 wherein said cation-exchange membrane is formed from a material having a polytetrafluoroethylene backbone and perfluorinated two-carbon sulfonated sidechains.
Claim 16
Dependent Claim
32 words
The instrument of claim 12 wherein said ion-exchange membrane is an anion-exchange membrane, whereby said instrument is adapted to quantitatively determine the concentration of a chemical reducing agent in the gaseous environment.
Claim 17
Dependent Claim
18 words
The instrument of claim 15 wherein said anion-exchange membrane is formed from a styrene-divinylbenzene copolymer having quaternary-ammonium sidechains.
Claim 18
Dependent Claim
93 words
A sensor adapted for use in an instrument utilized to quantitatively determine the concentration of chemical oxidizing and reducing agents in a gaseous environment, comprising: a first electrode exposed to said gaseous environment; a second electrode; an electrolyte solution; and an ion-exchange membrane adapted to contain said electrolyte solution, said second electrode in contact with said electrolyte solution, said ion-exchange membrane separating said electrolyte solution and second electrode from said first electrode, said first electrode in electrical contact with said ion-exchange membrane, thereby completing an electrochemical couple between said first and second electrodes.
Claim 19
Dependent Claim
93 words
A sensor adapted for use in an instrument utilized to quantitatively determine the concentration of chemical oxidizing and reducing agents in a gaseous environment, comprising: a first electrode exposed to said gaseous environment; a second electrode; an electrolyte solution; and an ion-exchange membrane adapted to contain said electrolyte solution, said second electrode in contact with said electrolyte solution, said ion-exchange membrane separating said electrolyte solution and second electrode from said first electrode, said first electrode in electrical contact with said ion-exchange membrane, thereby completing an electrochemical couple between said first and second electrodes.
Claim 20
Dependent Claim
16 words
The sensor of claim 17 wherein said first and second electrodes are formed from dissimilar metals.
Claim 21
Dependent Claim
32 words
The sensor of claim 18 wherein said ion-exchange membrane is a cation-exchange membrane, whereby said instrument is adapted to quantitatively determine the concentration of a chemical oxidizing agent in the gaseous environment.
Claim 22
Dependent Claim
23 words
The sensor of claim 19 wherein said cation-exchange membrane is formed from a material having a polytetrafluoroethylene backbone and perfluorinated two-carbon sulfonated sidechains.
Claim 23
Dependent Claim
32 words
The sensor of claim 18 wherein said ion-exchange membrane is an anion-exchange membrane, whereby said instrument is adapted to quantitatively determine the concentration of a chemical reducing agent in the gaseous environment.
Claim 24
Dependent Claim
18 words
The sensor of claim 21 wherein said anion-exchange membrane is formed from a styrene-divinylbenzene copolymer having quaternary-ammonium sidechains.
Claim 25
Dependent Claim
17 words
The sensor of claim 17 wherein said first and second electrodes are formed from the same metal.
Claim 26
Dependent Claim
32 words
The sensor of claim 23 wherein said ion-exchange membrane is a cation-exchange membrane, whereby said instrument is adapted to quantitatively determine the concentration of a chemical oxidizing agent in the gaseous environment.
Claim 27
Dependent Claim
23 words
The sensor of claim 24 wherein said cation-exchange membrane is formed from a material having a polytetrafluoroethylene backbone and perfluorinated two-carbon sulfonated sidechains.
Claim 28
Dependent Claim
32 words
The sensor of claim 23 wherein said ion-exchange membrane is an anion-exchange membrane, whereby said instrument is adapted to quantitatively determine the concentration of a chemical reducing agent in the gaseous environment.
Claim 29
Dependent Claim
18 words
The sensor of claim 26 wherein said anion-exchange membrane is formed from a styrene-divinylbenzene copolymer having quaternary-ammonium sidechains.
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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) | 1985-06-07 | 1985-12-07 | 1986-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-07 | 1989-12-07 | 1990-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-07 | 1993-12-07 | 1994-06-08 | $7700.00 | Window Closed / Lapsed |