Electrical apparatus for controlling liquid contaminants
CA 2191540 C · Owner: Owen, Bruce W. · Inventors: Owen, Bruce W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device is placed in a container containing flowing fluid to neutralize fluid contaminants and prevent their deposition on the walls of the container. The device includes a weak electrical current generator having an electric half-cell that forms an electric circuit with the earth-grounded container via the liquid and generates electrons to neutralize the charged contaminants. The generator includes one or more cupriferous tubes containing a mixture of vegetable oil, and powders of copper zinc, manganese, cellulose and predominantly iron. Preferably each tube contains:, vegetable oil - 5.0 - 20.0% iron powder - 50.0 - 80.0%, copper powder - 2.0 - 10.0% zinc powder - 2.0 - 10.0%, manganese …
Read the whole patent
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 November 28, 1996 and granted October 23, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 28, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 28, 2018.
- 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.