Cathodic protection system and delay-activation anode
Abstract
Abstract THE SPECIFICATION DISCLOSED AN EXTENDED LIFETIME CATHODIC PROTECTION SYSTEM EMPLOYING SEQUENTIALLY ACTIVATED GALVANIC ANODES. ALL OF THE ANODES ARE CONNECTED BY MEANS OF AN ELECTRICAL CONDUCTOR TO THE METALLIC STRUCTURE TO BE PROTECTED SO THAT AS ONE ANODE IS CONSUMED AN ADDITIONAL ANODE OR ANODES ARE ACTIVATED IN SEQUENCE TO PROVIDE CONTINUOUS ELECTRICAL CURRENT FLOW OVER ANY DESIRED PERIOD OF TIME. A DELAY-ACTIVATION ANODE IS DISCLOSED WITH A BODY OF ANODE MATERIAL ENCLOSED BY A HERMETIC CASING WHICH INCLUDES A RELATIVELY CORRODIBLE MATERIAL SUCH AS IRON. THE CORRODIBLE MATERIAL IS CHOSEN TO PROVIDE A PREDETERMINED CORROSION RATE WHEN IMMERSED IN A PARTICULAR ELEC- TROLYTE, WHEREBY AN OPENING IS CREATED TO EXPOSE THE ANODE MATERIAL AT A DESIRED DELAY TIME.
Inventors
- 👤 Floyd E Blount
- 👤 Wallace B Allen
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |