US3409526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for corrosion protection
Assignee: ConocoPhillips Co
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Filing: 1965-08-13
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Granted: 1968-11-05
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Expires: 1985-08-13
Abstract
No abstract record available.
Inventors
- 👤 William P Banks
- 👤 Eddie C French
- 👤 Norman L Conger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:33
CPC Classifications
C; C23; C23F; C23F13/00; C23F13/005; C23F13/02; C23F13/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A METHOD OF CORROSION PROTECTION FOR A METALLIC VESSEL CONTAINING A CORROSIVE SOLUTION, SAID METALLIC VESSEL AND CORROSIVE SOLUTION SYSTEM HAVING A POLARIZATION CURVE WHEREIN INCREASING NOBLE VESSEL POTENTIALS ARE CHARACTERIZED BY ANODIC CURRENT DENSITY THROUGH THE FLADE ARREST POTENTIAL AND THEN CATHODIC CURRENT DENSITY, COMPRISING THE STEPS OF: APPLYING DIRECT CURRENT ENERGY BETWEEN THE METALLIC VESSEL AND AN ELECTRODE IMMERSED IN SAID CORROSIVE SOLUTION; AND CONTROLLING THE POLARITY OF SAID APPLIED DIRECT CURRENT ENERGY IN ACCORDANCE WITH THE POTENTIAL OF THE METALLIC VESSEL.
Claim 2
Independent Claim
84 words
A METHOD OF CORROSION PROTECTION FOR A METALLIC VESSEL CONTAINING A CORROSIVE SOLUTION, SAID METALLIC VESSEL AND CORROSIVE SOLUTION SYSTEM HAVING A POLARIZATION CURVE WHEREIN INCREASING NOBLE VESSEL POTENTIALS ARE CHARACTERIZED BY ANODIC CURRENT DENSITY THROUGH THE FLADE ARREST POTENTIAL AND THEN CATHODIC CURRENT DENSITY, COMPRISING THE STEPS OF: APPLYING DIRECT CURRENT ENERGY BETWEEN THE METALLIC VESSEL AND AN ELECTRODE IMMERSED IN SAID CORROSIVE SOLUTION; AND CONTROLLING THE POLARITY OF SAID APPLIED DIRECT CURRENT ENERGY IN ACCORDANCE WITH THE POTENTIAL OF THE METALLIC VESSEL.
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) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |