US3272725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of electrolytically testing oxygen concentration
Assignee: Pan American Petroleum Corp
•
Filing: 1963-05-08
•
Granted: 1966-09-13
•
Expires: 1983-05-08
Abstract
No abstract record available.
Inventors
- 👤 Arthur W Garst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:27
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/404
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
IN A METHOD FOR MEASURING THE OXYGEN CONCENTRATION IN THE FLUID IN WHICH METHOD A SENSING ELECTRODE IS EXPOSED TO SAID FLUID AND THE ELECTRICAL CURRENT BETWEEN SAID SENSING ELECTRODE AND A REFERENCE ELECTRODE IS MEASURED AS AN INDICATION OF OXYGEN CONCENTRATION IN SAID FLUID, THE IMPROVEMENT COMPRISING: EMPLOYING AS SAID SENSING ELECTRODE A METAL IN AN ELECTROLYTE SURROUNDED BY A MEMBRANE PERMEABLE TO OXYGEN, SAID ELECTROLYTE BEING AN ALKALINE AQUEOUS SOLUTION OF AMMONIUM CHLORIDE AND SAID METAL BEING INERT TO SAID ELECTROLYTE, AND EMPLOYING AS SAID REFERENCE ELECTRODE CARBON IN AN ELECTROLYTE WHICH IS AN AQUEOUS SOLUTION OF A SULFUR-CONTAINING SALT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL THIOSULFATES AND ALKALI METAL SULFITES.
Claim 2
Dependent Claim
115 words
IN A METHOD FOR MEASURING THE OXYGEN CONCENTRATION IN THE FLUID IN WHICH METHOD A SENSING ELECTRODE IS EXPOSED TO SAID FLUID AND THE ELECTRICAL CURRENT BETWEEN SAID SENSING ELECTRODE AND A REFERENCE ELECTRODE IS MEASURED AS AN INDICATION OF OXYGEN CONCENTRATION IN SAID FLUID, THE IMPROVEMENT COMPRISING: EMPLOYING AS SAID SENSING ELECTRODE A METAL IN AN ELECTROLYTE SURROUNDED BY A MEMBRANE PERMEABLE TO OXYGEN, SAID ELECTROLYTE BEING AN ALKALINE AQUEOUS SOLUTION OF AMMONIUM CHLORIDE AND SAID METAL BEING INERT TO SAID ELECTROLYTE, AND EMPLOYING AS SAID REFERENCE ELECTRODE CARBON IN AN ELECTROLYTE WHICH IS AN AQUEOUS SOLUTION OF A SULFUR-CONTAINING SALT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL THIOSULFATES AND ALKALI METAL SULFITES.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |