US4624261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochemical measuring cell having an ancillary electrode
Assignee: Draegerwerk AG and Co KGaA
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Filing: 1985-09-03
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Granted: 1986-11-25
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Expires: 2005-09-03
Abstract
Abstract An electrochemical measuring cell is disclosed having a device for sensing an external electrical potential. The device is arranged in the region of the outer surface of the diffusion membrane of the cell. The device can be, for example, in the form of a conductive, gas permeable coating applied to the outer surface of the diffusion membrane.
Inventors
- 👤 Uvo Holscher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:09
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/145; A61B5/14542; A61B5/1468; A61B5/1477; G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/404
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
105 words
An electrochemical measuring cell comprising: an electrolyte; a measuring electrode disposed in said electrolyte; a counter electrode also disposed in said electrolyte; a housing for holding said electrolyte; a diffusion and sensing member including a diffusion membrane for separating said electrolyte from the ambient and having an outer surface facing away from said electrolyte; and, a coating applied to said outer surface of said diffusion membrane for sensing an external electrical potential, said coating being electrically conductive and permeable to gas; and, electric circuit means mounted on said housing for conducting said external potential away from said coating and making the same accessible for measurement.
Claim 2
Dependent Claim
105 words
An electrochemical measuring cell comprising: an electrolyte; a measuring electrode disposed in said electrolyte; a counter electrode also disposed in said electrolyte; a housing for holding said electrolyte; a diffusion and sensing member including a diffusion membrane for separating said electrolyte from the ambient and having an outer surface facing away from said electrolyte; and, a coating applied to said outer surface of said diffusion membrane for sensing an external electrical potential, said coating being electrically conductive and permeable to gas; and, electric circuit means mounted on said housing for conducting said external potential away from said coating and making the same accessible for measurement.
Claim 3
Dependent Claim
70 words
An electrochemical measuring cell comprising: an electrolyte; a measuring electrode disposed in said electrolyte; a counter electrode also disposed in said electrolyte; holding means for holding said electrolyte; a diffusion membrane for separating said electrolyte from the ambient and having an outer surface facing away from said electrolyte, said diffusion membrane being made of an electrically conductive plastic so as to permit the same to sense an external electrical potential.
Claim 4
Dependent Claim
70 words
An electrochemical measuring cell comprising: an electrolyte; a measuring electrode disposed in said electrolyte; a counter electrode also disposed in said electrolyte; holding means for holding said electrolyte; a diffusion membrane for separating said electrolyte from the ambient and having an outer surface facing away from said electrolyte, said diffusion membrane being made of an electrically conductive plastic so as to permit the same to sense an external electrical potential.
Claim 5
Dependent Claim
14 words
The electrochemical measuring cell of claim 2, said diffusion membrane being made of polypyrrole.
Claim 6
Dependent Claim
90 words
An electrochemical measuring cell comprising: an electrolyte; a measuring electrode disposed in said electrolyte; a counter electrode also disposed in said electrolyte; a housing for holding said electrolyte; and, a diffusion and sensing member including a diffusion membrane for separating said electrolyte from the ambient and having an outer surface facing away from said electrolyte; and, a gas permeable layer applied to said outer surface of said diffusion membrane for sensing an external potential, said layer being a metal layer having a wire mesh made of conductive material embedded therein.
Claim 7
Dependent Claim
90 words
An electrochemical measuring cell comprising: an electrolyte; a measuring electrode disposed in said electrolyte; a counter electrode also disposed in said electrolyte; a housing for holding said electrolyte; and, a diffusion and sensing member including a diffusion membrane for separating said electrolyte from the ambient and having an outer surface facing away from said electrolyte; and, a gas permeable layer applied to said outer surface of said diffusion membrane for sensing an external potential, said layer being a metal layer having a wire mesh made of conductive material embedded therein.
Claim 8
Dependent Claim
86 words
An electrochemical measuring cell comprising: an electrolyte; a measuring electrode disposed in said electrolyte; a counter electrode also disposed in said electrolyte; a housing for holding said electrolyte; and, a diffusion and sensing member including a diffusion membrane for separating said electrolyte from the ambient and having an outer surface facing away from said electrolyte; and, a gas permeable layer applied to said outer surface of said diffusion membrane for sensing an external potential, said layer being a graphite layer with a wire mesh embedded therein.
Claim 9
Dependent Claim
86 words
An electrochemical measuring cell comprising: an electrolyte; a measuring electrode disposed in said electrolyte; a counter electrode also disposed in said electrolyte; a housing for holding said electrolyte; and, a diffusion and sensing member including a diffusion membrane for separating said electrolyte from the ambient and having an outer surface facing away from said electrolyte; and, a gas permeable layer applied to said outer surface of said diffusion membrane for sensing an external potential, said layer being a graphite layer with a wire mesh embedded therein.
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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) | 1989-11-24 | 1990-05-26 | 1990-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-24 | 1994-05-26 | 1994-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-24 | 1998-05-26 | 1998-11-25 | $7700.00 | Window Closed / Lapsed |