Liquid delivery apparatus
CA 2090414 C · Owner: Mitchell, David · Inventors: Mitchell, David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
57) Abstract, There is disclosed a liquid delivery apparatus (I) comprising (i) a liquid reservoir (6) into which a liquid may be introduced via an inlet (11) to pressurise said liquid in the reservoir (6); (ii) an outlet via which said liquid may be discharged from the reservoir (6) under the pressure of the liquid in the vessel (6); (iii) a valve (18) between the reservoir (6) and the outlet (14) to control passage of liquid from the reservoir (6) to the outlet (14) said, valve (18) having (a) an opening (20) (b) a closure member (22), adapted to close the opening (20) and (c) a biasing means (32), the arrangement of the components of the valve (18) being such that the valve (18) is …
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 September 13, 1991 and granted April 16, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 13, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 13, 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.