Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
D. Brien Sirola0
Graham Hagens0
Date of Patent
August 25, 2009
0Patent Application Number
117837550
Date Filed
April 12, 2007
0Patent Primary Examiner
Patent abstract
Improved deep well grounding systems of the kind used for cathodic protection of ground installations according to the invention employ a combination of materials for the casing of the central metallic anode and the backfill in the well which exhibit a degree of permeability sufficient to allow by-product gases develop in ordinary use of this system to escape, avoiding unwanted cavitation, while minimizing the migration of ground water and the attendant undesirable environmental pollution.
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