US3207678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for determining cathodically protecting current densities
Assignee: Pure Oil Co
•
Filing: 1960-06-01
•
Granted: 1965-09-21
•
Expires: 1980-06-01
Abstract
No abstract record available.
Inventors
- 👤 Glenn A Marsh
- 👤 Schaschl Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:15
CPC Classifications
C; C23; C23F; C23F13/00; C23F13/02; C23F13/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
A METHOD FOR DETERMINING THE MINIMUM CURRENT DENSITY REQUIRED TO ACHIEVE SUBSTANTIALLY COMPLETE CATHODIC PROTECTION OF A CORRODIBLE METAL IN AN ELECTROLYTIC ENVIRONMENT COMPRISING DISPOSING A CATHODE AND AN ANODE CONSISTING OF TWO BARE SPECIMENS OF SAID METAL HAVING A HIGH RATIO OF SURFACE AREA TO VOLUME IN SPACED RELATIONSHIP IN SAID ENVIRONMENT, APPLYING BETWEEN SAID SPECIMENS A POTENTIAL FROM AN EXTERNAL SOURCE TO CAUSE A DIRECT CURRENT FLOW BETWEEN THE SAID SPECIMENS, DETERMINING THE CURRENT DENSITY APPLIED TO EACH OF SAID SPECIMENS, MEASURING THE RATE OF CORROSION OF EACH OF SAID SPECIMENS OCCURRING DURING THE PERIOD OF THE APPLIED CURRENT FLOW, DETERMINING FROM SAID CURRENT DENSITY AND FROM SAID MEASURED CORROSION RATES A LINEAR EQUATION EXPRESSING THE CORROSION RATE AS A FUNCTION OF CURRENT, AND SOLVING SAID EQUATION FOR CURRENT AT ZERO CORROSION RATE TO DETERMINE THE MINIMUM CURRENT CAPABLE OF ACHIEVING SUBSTANTIALLY COMPLETE CATHODIC PROTECTION OF SAID METAL IN SAID ELECTROLYTIC ENVIRONMENT.
Claim 2
Independent Claim
154 words
A METHOD FOR DETERMINING THE MINIMUM CURRENT DENSITY REQUIRED TO ACHIEVE SUBSTANTIALLY COMPLETE CATHODIC PROTECTION OF A CORRODIBLE METAL IN AN ELECTROLYTIC ENVIRONMENT COMPRISING DISPOSING A CATHODE AND AN ANODE CONSISTING OF TWO BARE SPECIMENS OF SAID METAL HAVING A HIGH RATIO OF SURFACE AREA TO VOLUME IN SPACED RELATIONSHIP IN SAID ENVIRONMENT, APPLYING BETWEEN SAID SPECIMENS A POTENTIAL FROM AN EXTERNAL SOURCE TO CAUSE A DIRECT CURRENT FLOW BETWEEN THE SAID SPECIMENS, DETERMINING THE CURRENT DENSITY APPLIED TO EACH OF SAID SPECIMENS, MEASURING THE RATE OF CORROSION OF EACH OF SAID SPECIMENS OCCURRING DURING THE PERIOD OF THE APPLIED CURRENT FLOW, DETERMINING FROM SAID CURRENT DENSITY AND FROM SAID MEASURED CORROSION RATES A LINEAR EQUATION EXPRESSING THE CORROSION RATE AS A FUNCTION OF CURRENT, AND SOLVING SAID EQUATION FOR CURRENT AT ZERO CORROSION RATE TO DETERMINE THE MINIMUM CURRENT CAPABLE OF ACHIEVING SUBSTANTIALLY COMPLETE CATHODIC PROTECTION OF SAID METAL IN SAID ELECTROLYTIC ENVIRONMENT.
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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |