US4227988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Potentiostat for use with electrochemical cells
Assignee: International Business Machines Corp
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Filing: 1979-03-30
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Granted: 1980-10-14
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Expires: 1999-03-30
Abstract
Abstract An improved potentiostat for use with electrochemical cells provides dynamic protection of both the electrochemical cell elements and the sensitive potentiostat components from any significant voltage or current overload. A comparator compares the potentiostat input voltage with the electrochemical cell reference electrode voltage. When the reference electrode voltage becomes substantially different from the potentiostat input voltage and exceeds a certain preset value, the comparator activates a control means that causes the cell current to go to zero. This system provides dynamic protection even as the input voltage varies.
Inventors
- 👤 Ronald K. Galwey
- 👤 Kay K. Kanazawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:51
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/49
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
83 words
A dynamic protection system for an electrochemical potentiostat-cell system having an input voltage V IN and a reference electrode with a potential V R comprising control means associated with the cell system, and a comparator associated with said control means for comparing the difference between V R and V IN wherein when the magnitude of the difference between the values of V IN and V R exceeds a preselected value said control means causes the current in the cell to go to zero.
Claim 2
Dependent Claim
83 words
A dynamic protection system for an electrochemical potentiostat-cell system having an input voltage V IN and a reference electrode with a potential V R comprising control means associated with the cell system, and a comparator associated with said control means for comparing the difference between V R and V IN wherein when the magnitude of the difference between the values of V IN and V R exceeds a preselected value said control means causes the current in the cell to go to zero.
Claim 3
Dependent Claim
16 words
A protection system as described in claim 1 wherein said control means is an electronic switch.
Claim 4
Dependent Claim
16 words
A protection system as described in claim 1 wherein said control means is an electromechanical switch.
Claim 5
Dependent Claim
15 words
A protection system as described in claim 1 including reset means associated with said comparator.
Claim 6
Dependent Claim
86 words
A potentiostat for use with an electrochemical cell having an input voltage V IN and a reference electrode with a potential V R comprising control means associated with said input voltage means and the cell, and a comparator associated with said control means for comparing the difference between V R and V IN wherein when the magnitude of the difference between the values of V IN and V R exceeds a preselected value, said control means causes the current in the cell to go to zero.
Claim 7
Dependent Claim
86 words
A potentiostat for use with an electrochemical cell having an input voltage V IN and a reference electrode with a potential V R comprising control means associated with said input voltage means and the cell, and a comparator associated with said control means for comparing the difference between V R and V IN wherein when the magnitude of the difference between the values of V IN and V R exceeds a preselected value, said control means causes the current in the cell to go to zero.
Claim 8
Dependent Claim
21 words
A potentiostat as described in claim 5 including an error signal amplifier connected between the input voltage and said control means.
Claim 9
Dependent Claim
90 words
An electrochemical potentiostat-cell system comprising an electrochemical cell having a reference electrode with a potential V R , a potentiostat associated with said cell and having an input voltage V IN , control means electrically connected to said cell, and a comparator for comparing the difference between V R and V IN associated with said control means wherein when the magnitude of the difference between the values of V IN and V R exceeds a preselected value, said control means causes the current in said cell to go to zero.
Claim 10
Dependent Claim
90 words
An electrochemical potentiostat-cell system comprising an electrochemical cell having a reference electrode with a potential V R , a potentiostat associated with said cell and having an input voltage V IN , control means electrically connected to said cell, and a comparator for comparing the difference between V R and V IN associated with said control means wherein when the magnitude of the difference between the values of V IN and V R exceeds a preselected value, said control means causes the current in said cell to go to zero.
Claim 11
Dependent Claim
15 words
An electrochemical potentiostat-cell as described in claim 7 wherein said control means is a switch.
Claim 12
Dependent Claim
17 words
An electrochemical potentiostat-cell as described in claim 7 including a current monitoring device associated with said cell.
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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) | 1983-10-14 | 1984-04-14 | 1984-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-14 | 1988-04-14 | 1988-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-14 | 1992-04-14 | 1992-10-14 | $7700.00 | Window Closed / Lapsed |