US3208925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anodic protection against corrosion
Assignee: ConocoPhillips Co
•
Filing: 1960-01-07
•
Granted: 1965-09-28
•
Expires: 1980-01-07
Abstract
No abstract record available.
Inventors
- 👤 Hutchison Merle
- 👤 Jr Olen L Riggs
- 👤 John D Sudbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:57
CPC Classifications
C; C23; C23F; C23F13/00; C23F13/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A METHOD OF ANODICALLY MINIMIZING CORROSION OF A METALLIC VESSEL CONTAINING A CORROSIVE SOLUTION, SAID METALLIC VESSEL AND CORROSIVE SOLUTION SYTEM HAVING AN ANODIC POLARIZATION CURVE WHEREIN THE METALLIC VESSEL AND CORROSIVE SOLUTION SHOWS A MINIUMUM CURRENT REGION COMPRISING PASSING DIRECT CURRENT FROM THE VESSEL TO AN INERT CATHODE IN THE SOLUTION UNTIL THE POTENTIAL DIFFERENCE BETWEEN THE VESSEL AND A STANDARD ELECTRODE WHICH IS N ELECTROCHEMICAL COMMUNICATION WITH THE CORROSIVE SOLUTION REACHES A LEVEL CORRESPONDING TO A PREDETERMINED MAXIMUM NOBILITY OF THE VESSEL, THEN STOPPING THE FLOW OF SAID CURRENT UNTIL SAID POTENTIAL DIFFERENCE REACHES A LEVEL CORRESPONDING TO A PREDETERMINED MINIUMUM NOBILITY OF THE VESSEL, THEN AGAIN PASSING SAID CURRENT FROM THE VESSEL TO THE CATHODE IN THE SOLTION UNTIL SAID POTENTIAL DIFFERENCE AGAIN REACHES SAID FIRST-MENTIONED LEVEL.
Claim 2
Independent Claim
130 words
A METHOD OF ANODICALLY MINIMIZING CORROSION OF A METALLIC VESSEL CONTAINING A CORROSIVE SOLUTION, SAID METALLIC VESSEL AND CORROSIVE SOLUTION SYTEM HAVING AN ANODIC POLARIZATION CURVE WHEREIN THE METALLIC VESSEL AND CORROSIVE SOLUTION SHOWS A MINIUMUM CURRENT REGION COMPRISING PASSING DIRECT CURRENT FROM THE VESSEL TO AN INERT CATHODE IN THE SOLUTION UNTIL THE POTENTIAL DIFFERENCE BETWEEN THE VESSEL AND A STANDARD ELECTRODE WHICH IS N ELECTROCHEMICAL COMMUNICATION WITH THE CORROSIVE SOLUTION REACHES A LEVEL CORRESPONDING TO A PREDETERMINED MAXIMUM NOBILITY OF THE VESSEL, THEN STOPPING THE FLOW OF SAID CURRENT UNTIL SAID POTENTIAL DIFFERENCE REACHES A LEVEL CORRESPONDING TO A PREDETERMINED MINIUMUM NOBILITY OF THE VESSEL, THEN AGAIN PASSING SAID CURRENT FROM THE VESSEL TO THE CATHODE IN THE SOLTION UNTIL SAID POTENTIAL DIFFERENCE AGAIN REACHES SAID FIRST-MENTIONED LEVEL.
References Cited (Backward Citations)
US2221997A
Cited
US2483397A
Cited
US2576680A
Cited
US2584816A
Cited
US2759887A
Cited
US2764543A
Cited
US2803797A
Cited
US2848658A
Cited
US2903405A
Cited
US2918420A
Cited
US2982714A
Cited
US2998371A
Cited
US3009865A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |