Patent US3362900A successfully refreshed from Google Patents.
US3362900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for cathodically protecting a structure
Assignee: Hull Protectors Inc
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Filing: 1962-10-17
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Granted: 1968-01-09
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Expires: 1982-10-17
Abstract
No abstract record available.
Inventors
- 👤 Rolland C Sabins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:44
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/145; H02M7/155; H02M7/1552; C; C23; C23F; C23F13/00; C23F13/02; C23F13/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A CONTROL SYSTEM FOR CATHODICALLY PROTECTING A STRUCTURE IMMERSED IN AN ELECTROLYTE, SAID SYSTEM COMPRISING: (A) AN ANODE IMMERSED IN THE ELECTROLYTE; (B) MEANS PROVIDING A SOURCE OF DIRECT CURRENT ALTERNATELY INCREASING FROM ZERO TO MAXIMUM VOLTAGE; (C) A SELF-FIRING CONTROLLED RECTIFIER HAVING: (1) A GATE; (D) A CURRENT SUPPLY CIRCUIT FOR IMPRESSING A CURRENT ON THE STRUCTURE, SAID CIRCUIT INCLUDING TH ANODE, SAID STURCTURE, SAID ELECTROLYTE AND SAID SOURCE OF DIRECT CURRENT, AND SAID SELF-FIRING CONTROLLED RECTIFIER; (E) A REFERENCE ANODE IMMERSED IN THE ELECTROLYTE; (F) A SINGLE CIRCUIT FOR COMPLETELY CONTROLLING THE IMPRESSED CURRENT BY TRIGGERING THE SELF-FIRING CONTROLLED RECTIFIER; SAID LAST MENTIONED CIRCUIT INCLUDING SAID STRUCTURE, THE REFERENCE ANODE, THE ELECTROLYTE, AND FURTHER INCLUDING: (1) MEANS CONNECTED WITH THE GATE OF THE SELFFIRING CONTROLLED RECTIFIER AND RESPONSIVE TO VARIATION IN POTENTIAL BETWEEN THE REFERENCE ANODE AND SAID STRUCTURE FOR TRIGGERING SAID RECTIFIER.
Claim 2
Dependent Claim
145 words
A CONTROL SYSTEM FOR CATHODICALLY PROTECTING A STRUCTURE IMMERSED IN AN ELECTROLYTE, SAID SYSTEM COMPRISING: (A) AN ANODE IMMERSED IN THE ELECTROLYTE; (B) MEANS PROVIDING A SOURCE OF DIRECT CURRENT ALTERNATELY INCREASING FROM ZERO TO MAXIMUM VOLTAGE; (C) A SELF-FIRING CONTROLLED RECTIFIER HAVING: (1) A GATE; (D) A CURRENT SUPPLY CIRCUIT FOR IMPRESSING A CURRENT ON THE STRUCTURE, SAID CIRCUIT INCLUDING TH ANODE, SAID STURCTURE, SAID ELECTROLYTE AND SAID SOURCE OF DIRECT CURRENT, AND SAID SELF-FIRING CONTROLLED RECTIFIER; (E) A REFERENCE ANODE IMMERSED IN THE ELECTROLYTE; (F) A SINGLE CIRCUIT FOR COMPLETELY CONTROLLING THE IMPRESSED CURRENT BY TRIGGERING THE SELF-FIRING CONTROLLED RECTIFIER; SAID LAST MENTIONED CIRCUIT INCLUDING SAID STRUCTURE, THE REFERENCE ANODE, THE ELECTROLYTE, AND FURTHER INCLUDING: (1) MEANS CONNECTED WITH THE GATE OF THE SELFFIRING CONTROLLED RECTIFIER AND RESPONSIVE TO VARIATION IN POTENTIAL BETWEEN THE REFERENCE ANODE AND SAID STRUCTURE FOR TRIGGERING SAID RECTIFIER.
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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) | 1971-01-08 | 1971-07-10 | 1972-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-08 | 1975-07-10 | 1976-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-08 | 1979-07-10 | 1980-01-09 | $7700.00 | Window Closed / Lapsed |