Fluid control valve arrangement
CA 2102901 C · Owner: Photovac International, Inc. · Inventors: Bassett, Mark D.; Leveson, Richard C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fluid control valve arrangement includes a plurality of clusters or pairs of holes extending from one face to the other of a central block (11). The valves (20) comprise a plurality of deformable blisters (12a) formed in a resilient membrane (12) the blis-, ters (12a) positioned so as to coincide with the hole clusters or pairs when the membrane (12) is pressed against a face of the block. The valves are closed when the blisters are deformed to an essentially flat shape, advantageously by introducing a high pressure fluid into a cavity (14a) above the blisters (12a). The valves (20) are linked together in a desired configuration by grooves (11b) formed in the other face of the block …
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 May 19, 1992 and granted April 2, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 19, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 19, 2014.
- 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.