Patent US3055813A successfully refreshed from Google Patents.
US3055813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Current controller for use in cathodic protection of steel structures
Assignee: Pure Oil Co
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Filing: 1958-11-17
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Granted: 1962-09-25
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Expires: 1978-11-17
Abstract
No abstract record available.
Inventors
- 👤 Schaschl Edward
- 👤 Glenn A Marsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:06
CPC Classifications
C; C23; C23F; C23F13/00; C23F13/02; C23F13/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A METHOD FOR CONTROLLING THE CURRENT DENSITY ON A METAL STRUCTURE LOCATED IN AN ELECTROLYTICALL CORROSIVE ENVIRONMENT AND CONNECTED TO AN ANODE LOCATED IN SAID ELECTROLYTICALLY CORROSIVE ENVIRONMENT TO PROVIDE CATHODIC PROTECTION COMPRISING ESTABLISHING A BI-METALLIC COUPLE COMPOSED OF SPACED, DISSIMILAR PLATES OF METAL IN A CIRCUIT SEPARATE FROM SAID ANODE CIRCUIT, AND EXPOSING SAID COUPLE TO THE ELECTROLYTICALLY CORROSIVE ENVIRONMENT IN CLOSE PROMIMITY TO SAID METAL STRUCTURE AND SAID ANODE, CONTINUOUSLY DETECTING CHANGES IN ELECTROLYTIC ACTIVITY IN SAID ENVIRONMENT BY MEANS OF SAID COUPLE WHILE SAID STRUCTURE REMAINS UNDER CATHODIC PROTECTION, AND APPLYING SAID DETECTED CHANGE IN THE FORM OF A SIGNAL TO MEANS FOR INCREASING THE CATHODIC CURRENT IN RESPONSE TO INCREASES IN SAID ELECTROLYTIC ACTIVITY.
Claim 2
Independent Claim
118 words
A METHOD FOR CONTROLLING THE CURRENT DENSITY ON A METAL STRUCTURE LOCATED IN AN ELECTROLYTICALL CORROSIVE ENVIRONMENT AND CONNECTED TO AN ANODE LOCATED IN SAID ELECTROLYTICALLY CORROSIVE ENVIRONMENT TO PROVIDE CATHODIC PROTECTION COMPRISING ESTABLISHING A BI-METALLIC COUPLE COMPOSED OF SPACED, DISSIMILAR PLATES OF METAL IN A CIRCUIT SEPARATE FROM SAID ANODE CIRCUIT, AND EXPOSING SAID COUPLE TO THE ELECTROLYTICALLY CORROSIVE ENVIRONMENT IN CLOSE PROMIMITY TO SAID METAL STRUCTURE AND SAID ANODE, CONTINUOUSLY DETECTING CHANGES IN ELECTROLYTIC ACTIVITY IN SAID ENVIRONMENT BY MEANS OF SAID COUPLE WHILE SAID STRUCTURE REMAINS UNDER CATHODIC PROTECTION, AND APPLYING SAID DETECTED CHANGE IN THE FORM OF A SIGNAL TO MEANS FOR INCREASING THE CATHODIC CURRENT IN RESPONSE TO INCREASES IN SAID ELECTROLYTIC ACTIVITY.
References Cited (Backward Citations)
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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) | 1965-09-24 | 1966-03-26 | 1966-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-24 | 1970-03-26 | 1970-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-24 | 1974-03-26 | 1974-09-25 | $7700.00 | Window Closed / Lapsed |