US4551209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of calibrating conductive metal oxide electrodes
Assignee: Integrated Ionics Inc
•
Filing: 1984-01-19
•
Granted: 1985-11-05
•
Expires: 2004-01-19
Abstract
Abstract A conductive metal oxide electrode can be calibrated by immersing the electrode and a reference electrode in a solution of known pH and applying to them a setting potential which is approximately equal to the steady state potential that would be observed for that electrode with respect to the reference electrode in a solution of that value of pH.
Inventors
- 👤 Imants R. Lauks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:31
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/4163; G01N27/4165
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
112 words
A method for calibrating conductive metal oxide electrodes wherein the oxide is an oxide of a metal selected from the group consisting of platinum and rhenium group metals comprising the steps of: immersing said metal oxide electrode into a solution of known pH; immersing a reference electrode into said solution, and applying across said metal oxide electrode and said reference electrode a potential equal to approximately the steady state potential that is observed for a second electrode having substantially the same chemical composition as said metal oxide electrode when said second second electrode is immersed in a solution of the same pH and is allowed to stabliize slowly in open circuit conditions.
Claim 2
Independent Claim
112 words
A method for calibrating conductive metal oxide electrodes wherein the oxide is an oxide of a metal selected from the group consisting of platinum and rhenium group metals comprising the steps of: immersing said metal oxide electrode into a solution of known pH; immersing a reference electrode into said solution, and applying across said metal oxide electrode and said reference electrode a potential equal to approximately the steady state potential that is observed for a second electrode having substantially the same chemical composition as said metal oxide electrode when said second second electrode is immersed in a solution of the same pH and is allowed to stabliize slowly in open circuit conditions.
Claim 3
Dependent Claim
15 words
The method of claim 1 wherein said metal oxide electrode is an iridium oxide electrode.
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) | 1988-11-04 | 1989-05-06 | 1989-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-04 | 1993-05-06 | 1993-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-04 | 1997-05-06 | 1997-11-05 | $7700.00 | Window Closed / Lapsed |