Patent US3143670A successfully refreshed from Google Patents.
US3143670A
Expired / Lapsed
US
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Self-regulating cathodic protection system
Assignee: Harco Corp
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Filing: 1962-04-11
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Granted: 1964-08-04
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Expires: 1982-04-11
Abstract
No abstract record available.
Inventors
- 👤 Husock Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:23
CPC Classifications
C; C23; C23F; C23F13/00; C23F13/02; C23F13/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A SELF-REGULATING CATHODIC PROTECTION SYSTEM FOR UNDERGROUND METAL STORAGE TANKS AND THE LIKE COMPRISING A PLURALITY OF CORROSION-RESISTANT ANODES BURIED ADJACENT BUT OUT OF CONTACT WITH SUCH TANK, AN ALTERNATING CURRENT SOURCE, INDIVIDUAL LINES IN PARALLEL CONNECTED TO SAID ANODES AND SAID SOURCE, A LINE CONNECTED TO SAID AS THE CATHODE AND TO SAID SOURCE, A READILY REMOVABLE PLUG-IN CAN CONNECTED INTO EACH SAID INDIVIDUAL PARALLEL LINE CONTAINING A SILICON DIODE RECTIFIER AND A RESISTOR IN SERIES IN SAID LINE, AN AMMETER IN SERIES BETWEEN SAID SOURCE AND ALL SAID PARALLEL LINES, AND A SWITCH IN SERIES BETWEEN SAID SOURCE AND ALL SAID PARALLEL LINES.
Claim 2
Dependent Claim
105 words
A SELF-REGULATING CATHODIC PROTECTION SYSTEM FOR UNDERGROUND METAL STORAGE TANKS AND THE LIKE COMPRISING A PLURALITY OF CORROSION-RESISTANT ANODES BURIED ADJACENT BUT OUT OF CONTACT WITH SUCH TANK, AN ALTERNATING CURRENT SOURCE, INDIVIDUAL LINES IN PARALLEL CONNECTED TO SAID ANODES AND SAID SOURCE, A LINE CONNECTED TO SAID AS THE CATHODE AND TO SAID SOURCE, A READILY REMOVABLE PLUG-IN CAN CONNECTED INTO EACH SAID INDIVIDUAL PARALLEL LINE CONTAINING A SILICON DIODE RECTIFIER AND A RESISTOR IN SERIES IN SAID LINE, AN AMMETER IN SERIES BETWEEN SAID SOURCE AND ALL SAID PARALLEL LINES, AND A SWITCH IN SERIES BETWEEN SAID SOURCE AND ALL SAID PARALLEL LINES.
References Cited (Backward Citations)
US1055327A
Cited
US1726738A
Cited
US1962696A
Cited
US2053214A
Cited
US2803797A
Cited
US2916721A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |