Comprehensive water treatment system
CA 2038358 A1 · Owner: Tucker, David L. · Inventors: Tucker, David L.; Brane, Earl P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In its broadest aspects a method for the cyclic regeneration of a water system is disclosed. The water softening system comprises an exchange medium in a tank which is in fluid communication with a brine storage tank. This method comprises the steps of filling the brine storage tank with refill NO.2 of softened water in a quantity sufficient to create sufficient brine for said exchange medium said brine storage tank already, containing refill NO.1 of softened water from a later step of the method. The exchange medium is subjected to backwashing NO.1 with water flowing counter the direction of water flowing therethrough during water softening operations. Next, brine from the brine storage …
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 March 15, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 15, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 15, 2013.
- 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.