Patent US2282830A successfully refreshed from Google Patents.
US3182007A
Expired / Lapsed
US
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Electrode assembly for the anodic passivation of metals
Assignee: ConocoPhillips Co
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Filing: 1959-03-09
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Granted: 1965-05-04
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Expires: 1979-03-09
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
2026-10-26 19:50
CPC Classifications
C; C23; C23F; C23F13/00; C23F13/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
IN AN ANODIC PASSIVATION SYSTEM CONTAINING A CORROSIVE SOLUTION WITHIN A METALLIC VESSEL, WHEREIN A DIRECT CURRENT POTENIAL IS APPLIED BETWEEN A CATHODE DISPOSED IN SAID SOLUTION AND SAID METALLIC VESSEL, AND WHEREIN SAID CATHODE IS MOUNTED IN SUCH PROXIMITY TO THE INNER SURFACE OF SAID VESSEL THAT EXCESSIVE POSITIVE POTENTIAL IS CREATED AT THE INNER SURFACE OF THE VESSEL IN THE NEAR PROXIMITY OF SAID CATHODE WHEREBY EXCESSIVE CORROSION OF SAID VESSEL OCCURS, THE IMPROVEMENT WHICH COMPRISES: PROVIDING A ZONE OF ELECTRICALLY INSULATING MATERIAL DISPOSED BETWEEN SAID VESSEL WALL AND SAID CATHODE, SAID ZONE BEING ADAPTED TO SHIELD SAID VESSEL FROM SAID CATHODE AND THEREBY REDUCE SAID POTENTIAL AND SAID CORROSION.
Claim 2
Dependent Claim
112 words
IN AN ANODIC PASSIVATION SYSTEM CONTAINING A CORROSIVE SOLUTION WITHIN A METALLIC VESSEL, WHEREIN A DIRECT CURRENT POTENIAL IS APPLIED BETWEEN A CATHODE DISPOSED IN SAID SOLUTION AND SAID METALLIC VESSEL, AND WHEREIN SAID CATHODE IS MOUNTED IN SUCH PROXIMITY TO THE INNER SURFACE OF SAID VESSEL THAT EXCESSIVE POSITIVE POTENTIAL IS CREATED AT THE INNER SURFACE OF THE VESSEL IN THE NEAR PROXIMITY OF SAID CATHODE WHEREBY EXCESSIVE CORROSION OF SAID VESSEL OCCURS, THE IMPROVEMENT WHICH COMPRISES: PROVIDING A ZONE OF ELECTRICALLY INSULATING MATERIAL DISPOSED BETWEEN SAID VESSEL WALL AND SAID CATHODE, SAID ZONE BEING ADAPTED TO SHIELD SAID VESSEL FROM SAID CATHODE AND THEREBY REDUCE SAID POTENTIAL AND SAID CORROSION.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-03 | 1968-11-02 | 1969-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-03 | 1972-11-02 | 1973-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-03 | 1976-11-02 | 1977-05-04 | $7700.00 | Window Closed / Lapsed |