Cathodic protection system and method for above-ground storage tank bottoms
CA 2063034 C · Owner: Bushman, James B. · Inventors: Bushman, James B.; Kroon, David H.; Baach, Michael K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a catholic protection system for an above-ground storage, tank having a metal bottom, both new and retrofitted bottoms. A leak containing, dielectric safety membrane is spaced a short distance below and extends beneath the tank, bottom generally parallel thereto forming a narrow envelope. Compacted electrolytic, conductor is positioned between the membrane and the tank bottom supporting the tank, bottom embedding a horizontally disposed catholic protection anode the anode , being in, the form of a matrix or grid of interconnected titanium bars and ribbons. A reticulate, dielectric insulator may be embedded in the electrolytic conductor and positioned …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed March 13, 1992 and granted May 23, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 13, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 13, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.