Liquid proportioning system
CA 2028469 C · Owner: Kosup, Gilbert G. · Inventors: Robertson, Jeffrey W.; Kosup, Gilbert G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A liquid proportioning system constructed according to the principles of the present invention mixes a primary liquid with liquid additive from at least one liquid additive reservoir. The system includes a manifold in which the primary liquid and the liquid additive are mixed. The manifold has an outlet for discharging the mixture, a first inlet for receiving the primary liquid and a second inlet for receiving liquid additive. A plurality of conduits each carry the liquid additive to the manifold from the liquid additive reservoir. Each conduit delivers the liquid additive to the manifold at a different rate under substantially the same operating conditions so that the connection of each …
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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 October 24, 1990 and granted October 22, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 24, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 24, 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
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.