Water purification device
CA 2003049 A1 · Owner: Heinig, Charles F. Jr. · Inventors: Lemire, George J.; Heinig, Charles F. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for treating water within a swimming pool wherein a portion of such water is diverted to the device. The device utilizes a canister in which dissimilar metals preferably silver and copper are positioned such that the water passing between them acts as a conductor and establishes a voltaic cell whereby the metals are eroded so as to supply the water with an effective level of silver and copper ions. Such metal ions effectively act as germicides and algaecides.
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 15, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 15, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 15, 2011.
- 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.