Apparatus and method for discharging fluid additives into a water treatment vessel
CA 2181007 C · Owner: Ruehrwein, Donald N. · Inventors: Schleife, James M.; Ruehrwein, Donald N.; Fassbender, John J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for discharging an additive into water in a treatment vessel comprises discharging means and means for feeding the additive to the discharging means. The discharging means may comprise a pipe, a nozzle or a, header conduit having a number of outlets. A method for discharging an additive into water in a treatment vessel includes the steps of adjusting the elevation of an outlet in a conduit relative to the treatment vessel and discharging the additive from the outlet in the conduit into water in the treatment vessel.
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 July 11, 1996 and granted October 28, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 11, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 11, 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.