Method and apparatus for controlling the relative humidity in concrete and masonry structures
CA 2048997 C · Owner: Electro Pulse Technologies Of America, Inc. · Inventors: Utklev, Kjell
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for expulsion or control of humidity in a concrete and/or masonry structure wherein one or more electrodes are provided in the structure. The electrodes are made of a non-corrosive material and connected , in series or parallel with the current source. An earth electrode is provided adjacent to or on the structure. The electrode(s) represents the anode and the earth electrode represents the cathode in an electrode circuit when they are connected with the respective outputs in the current source. The anode and cathode are provided with a pulse voltage supplied by the current source. The pulse voltage is delivered sequentially as pulse sequences of a given …
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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 12, 1990 and granted May 23, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 12, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 12, 2012.
- 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
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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.