Valve assembly for fluid ingress and egress
CA 2238997 C · Owner: Vent-Matic Co. Inc. · Inventors: Amidzich, Bradford
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A valve assembly (20, 220, 320, 420), securable in an upper opening of a container (26, 226, 326, 426) for liquids. The valve assembly preferably includes a stub (22, 222, 322, 422) and a riser pipe/valving unit detachably mounted in the stub. The valving unit substantially consists of a unified riser pipe (34, 234, 334, 434) having blockable gas and/or liquid portals and , movable members arranged co-axially within two upper reception areas in the riser pipe and including a single sealing ring (38 238, 338, 438) and a , dispensing tower (36 236, 336, 436). The sealing ring is axially displaceable against the pressure of a spring to move from a neutral closed position to a lower open …
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 December 10, 1996 and granted February 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 10, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 10, 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.