US3850736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for measuring accelerated corrosion rate
Assignee: Individual
•
Filing: 1972-09-25
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Granted: 1974-11-26
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Expires: 1992-09-25
Abstract
Abstract A device for cathodically polarizing two duplicated electrodes with substantially no interference with corrosion current measurement made with said electrodes.
Inventors
- 👤 R Seyl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:17
CPC Classifications
G; G01; G01N; G01N17/00; G01N17/02; G01N27/00; G01N27/26; G01N27/416; G01N27/49
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
117 words
A device for cathodically polarizing two duplicated electrodes with substantially no interference with corrosion current measurement made with said electrodes, including an anode terminal for connecting to an anode electrode, a source of variable DC voltage with positive pole connected to said anode terminal, a current indicating meter in series with said source of variable DC voltage, two duplicated isolation resistors each connected at one end to the negative pole of said variable voltage delivery system, said indicating meter being in a series circuit with said anode terminal and said isolation resistors, and two cathode terminals each connected to the other end of one of said two isolation resistors and for connection to the two duplicated electrodes.
Claim 2
Independent Claim
117 words
A device for cathodically polarizing two duplicated electrodes with substantially no interference with corrosion current measurement made with said electrodes, including an anode terminal for connecting to an anode electrode, a source of variable DC voltage with positive pole connected to said anode terminal, a current indicating meter in series with said source of variable DC voltage, two duplicated isolation resistors each connected at one end to the negative pole of said variable voltage delivery system, said indicating meter being in a series circuit with said anode terminal and said isolation resistors, and two cathode terminals each connected to the other end of one of said two isolation resistors and for connection to the two duplicated electrodes.
Claim 3
Independent Claim
138 words
A device for cathodically polarizing two duplicated electrodes with substantially no interference with corrosion current measurement made with said electrodes, including an anode terminal for connecting to an anode electrode, a source of variable DC voltage with positive pole connected to said anode terminal, a current indicating meter in series with said source of variable DC voltage, a drive mechanism coupled to said source of variable DC voltage to deliver the voltage at a selected regularly increasing rate, two duplicated isolation resistors each connected at one end to the negative pole of said variable voltage delivery systems, said indicating meter being in a series circuit with said anode terminal and said isolation resistors, and two cathode terminals each connected to the other end of one of said two isolation resistors and for connecting to the two duplicated electrodes.
Claim 4
Independent Claim
138 words
A device for cathodically polarizing two duplicated electrodes with substantially no interference with corrosion current measurement made with said electrodes, including an anode terminal for connecting to an anode electrode, a source of variable DC voltage with positive pole connected to said anode terminal, a current indicating meter in series with said source of variable DC voltage, a drive mechanism coupled to said source of variable DC voltage to deliver the voltage at a selected regularly increasing rate, two duplicated isolation resistors each connected at one end to the negative pole of said variable voltage delivery systems, said indicating meter being in a series circuit with said anode terminal and said isolation resistors, and two cathode terminals each connected to the other end of one of said two isolation resistors and for connecting to the two duplicated electrodes.
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) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |