Patent US2943027A successfully refreshed from Google Patents.
US2943027A
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US
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Method and apparatus for determining current density
Assignee: Pure Oil Co
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Filing: 1957-10-09
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Granted: 1960-06-28
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Expires: 1977-10-09
Abstract
No abstract record available.
Inventors
- 👤 Schaschl Edward
- 👤 Glenn A Marsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:31
CPC Classifications
C; C23; C23F; C23F13/00; C23F13/02; C23F13/04; G; G01; G01R; G01R19/00; G01R19/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A METHOD FOR DETERMINING CURRENT DENSITY ON AN UNDERGROUND METAL STRUCTURE LOCATED IN AN ELECTROLYTE AND CONNECTED TO AN ANODE BURIED IN SAID ELECTROLYTE TO PROVIDE CATHODIC PROTECTION COMPRISING, CONNECTING AN ELECTRODE OF THE SAME METAL AND HAVING THE SAME ELECTRICAL RESISTANCE CONSTANT AS SAID METAL STRUCTURE FOR A GIVEN ELECTROLYTE TO A POINT ON THE SURFACE OF THE UNDERGROUND STRUCTURE AND POSITIONING THE ELECTRODE IN THE ELECTROLYTE IN CLOSE PROXIMITY TO SAID POINT OF CONNECTION, IMPRESSING A VOLTAGE ON SAID ELECTRODE TO MAINTAIN THE SAME AT THE SAME POTENTIAL AS SAID POINT OF CONNECTION RELATIVE TO SAID ANODE, AND MEASURING THE CURRENT FLOW FROM SAID ELECTRODE TO SAID ANODE, SAID CURRENT FLOW DIVIDED BY THE SURFACE AREA SAID ELECTRODE BEING EQUAL TO THE CURRENT DENSITY ON SAID METAL STRUCTURE IN THE REGION OF SAID POINT OF CONNECTION.
Claim 2
Independent Claim
138 words
A METHOD FOR DETERMINING CURRENT DENSITY ON AN UNDERGROUND METAL STRUCTURE LOCATED IN AN ELECTROLYTE AND CONNECTED TO AN ANODE BURIED IN SAID ELECTROLYTE TO PROVIDE CATHODIC PROTECTION COMPRISING, CONNECTING AN ELECTRODE OF THE SAME METAL AND HAVING THE SAME ELECTRICAL RESISTANCE CONSTANT AS SAID METAL STRUCTURE FOR A GIVEN ELECTROLYTE TO A POINT ON THE SURFACE OF THE UNDERGROUND STRUCTURE AND POSITIONING THE ELECTRODE IN THE ELECTROLYTE IN CLOSE PROXIMITY TO SAID POINT OF CONNECTION, IMPRESSING A VOLTAGE ON SAID ELECTRODE TO MAINTAIN THE SAME AT THE SAME POTENTIAL AS SAID POINT OF CONNECTION RELATIVE TO SAID ANODE, AND MEASURING THE CURRENT FLOW FROM SAID ELECTRODE TO SAID ANODE, SAID CURRENT FLOW DIVIDED BY THE SURFACE AREA SAID ELECTRODE BEING EQUAL TO THE CURRENT DENSITY ON SAID METAL STRUCTURE IN THE REGION OF SAID POINT OF CONNECTION.
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) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |