US3371023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for automatically regulating the passivation potential of metals
Assignee: ConocoPhillips Co
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Filing: 1964-05-07
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Granted: 1968-02-27
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Expires: 1984-05-07
Abstract
No abstract record available.
Inventors
- 👤 William P Banks
- 👤 Richard L Every
- 👤 Norman L Conger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:43
CPC Classifications
C; C23; C23F; C23F13/00; C23F13/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A METHOD FOR PROTECTING A METALLIC SPECIMEN AGAINST CORROSION BY A CORROSIVE ELECTROLYTE IN CONTACT WITH SAID SPECIMEN WHICH COMPRISES: ANODICALLY POLARIZING THE SPECIMEN RELATIVE TO AN INERT ELECTRODE PLACED IN CONTACT WITH SAID ELECTROLYTE; MEASURING THE ELECTRICAL POTENTIAL OF THE METALLIC SPECIMEN RELATIVE TO A REFERENCE ELECTRICAL POTENTIAL OF CONSTANT VALUE; PASSING AN ELECTRICAL CURRENT BETWEEN SAID INERT ELECTRODE AND SAID METALIC SPECIMEN; VARYING THE ELECTRICAL CURRENT PASSED BETWEEN SAID INERT ELECTRODE AND SAID METALLIC SPECIMEN IN RESPONSE TO CHANGES IN THE MEASURED ELECTRICAL POTENTIAL OF SAID METALLIC SPECIMEN SO AS TO MAINTAIN SAID ELECTRICAL POTENTIAL AT A VALUE AT WHICH SAID METALLIC SPECIMEN IS LEAST SUSCEPTIBLE TO CORROSION;
Claim 2
Independent Claim
110 words
A METHOD FOR PROTECTING A METALLIC SPECIMEN AGAINST CORROSION BY A CORROSIVE ELECTROLYTE IN CONTACT WITH SAID SPECIMEN WHICH COMPRISES: ANODICALLY POLARIZING THE SPECIMEN RELATIVE TO AN INERT ELECTRODE PLACED IN CONTACT WITH SAID ELECTROLYTE; MEASURING THE ELECTRICAL POTENTIAL OF THE METALLIC SPECIMEN RELATIVE TO A REFERENCE ELECTRICAL POTENTIAL OF CONSTANT VALUE; PASSING AN ELECTRICAL CURRENT BETWEEN SAID INERT ELECTRODE AND SAID METALIC SPECIMEN; VARYING THE ELECTRICAL CURRENT PASSED BETWEEN SAID INERT ELECTRODE AND SAID METALLIC SPECIMEN IN RESPONSE TO CHANGES IN THE MEASURED ELECTRICAL POTENTIAL OF SAID METALLIC SPECIMEN SO AS TO MAINTAIN SAID ELECTRICAL POTENTIAL AT A VALUE AT WHICH SAID METALLIC SPECIMEN IS LEAST SUSCEPTIBLE TO CORROSION;
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) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |