Patent US2987461A successfully refreshed from Google Patents.
US2987461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system and method
Assignee: Individual
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Filing: 1958-12-19
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Granted: 1961-06-06
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Expires: 1978-12-19
Abstract
No abstract record available.
Inventors
- 👤 Rolland C Sabins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:31
CPC Classifications
C; C23; C23F; C23F13/00; C23F13/02; C23F13/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN A CONTROL SYSTEM FOR CATHODICALLY PROTECTING A STRUCTURE IMMERSED IN AN ELECTROLYTE, AN ANODE IMMERSED IN THE ELECTROLYTE, MEANS CONNECTED TO SAID ANODE AND STRUCTURE AND OPERATIVE TO IMPRESS A CURRENT FLOW BETWEEN SAID ANODE AND THE STRUCTURE TO RAISE THE POTENTIAL OF SAID STRUCTURE AND CAUSE IT TO SERVE AS A CATHODE, A MONITORING SYSTEM INCLUDING A DRIVE BI-POLAR ELECTRODE, AN ELECTRICAL CONDUCTOR CONNECTING SAID STRUCTURE TO THE DRIVE BI-POLAR ELECTRODE, A SECOND BI-POLAR ELECTRODE, MEANS INCLUDING A RESISTANCE CONNECTING SAID DRIVE AND BI-POLAR ELECTRODES, A SECOND ANODE, MEANS INCLUDING AN EXTRANEOUS SOURCE OF D.C. CURRENT BETWEEN THE SECOND MENTIONED ANODE AND THE SECOND MENTIONED BI-POLAR ELECTRODE, SAID BI-POLAR ELECTRODES AND LAST MENTIONED ANODE BEING IMMERSED IN SAID ELECTROLYTE, AND MEANS RESPONSIVE TO THE FLOW OF CURRENT FROM THE DRIVE BI-POLAR ELECTRODE TO SAID STRUCTURE FOR CONTROLLING THE FIRST MENTIONED MEANS.
Claim 2
Dependent Claim
143 words
IN A CONTROL SYSTEM FOR CATHODICALLY PROTECTING A STRUCTURE IMMERSED IN AN ELECTROLYTE, AN ANODE IMMERSED IN THE ELECTROLYTE, MEANS CONNECTED TO SAID ANODE AND STRUCTURE AND OPERATIVE TO IMPRESS A CURRENT FLOW BETWEEN SAID ANODE AND THE STRUCTURE TO RAISE THE POTENTIAL OF SAID STRUCTURE AND CAUSE IT TO SERVE AS A CATHODE, A MONITORING SYSTEM INCLUDING A DRIVE BI-POLAR ELECTRODE, AN ELECTRICAL CONDUCTOR CONNECTING SAID STRUCTURE TO THE DRIVE BI-POLAR ELECTRODE, A SECOND BI-POLAR ELECTRODE, MEANS INCLUDING A RESISTANCE CONNECTING SAID DRIVE AND BI-POLAR ELECTRODES, A SECOND ANODE, MEANS INCLUDING AN EXTRANEOUS SOURCE OF D.C. CURRENT BETWEEN THE SECOND MENTIONED ANODE AND THE SECOND MENTIONED BI-POLAR ELECTRODE, SAID BI-POLAR ELECTRODES AND LAST MENTIONED ANODE BEING IMMERSED IN SAID ELECTROLYTE, AND MEANS RESPONSIVE TO THE FLOW OF CURRENT FROM THE DRIVE BI-POLAR ELECTRODE TO SAID STRUCTURE FOR CONTROLLING THE FIRST MENTIONED MEANS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |