In line valve
CA 2000948 A1 · Owner: Valavaara, Viljo K. · Inventors: Valavaara, Viljo K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A valve for use in association with a pressure chamber and having a valve body with a passageway therethrough and an upstream valve surface and a downstream valve surface, an inlet conduit formed in the valve body communicating with the upstream surface a valve, stem located within the passageway adapted to permit flow of fluid through the passageway an upstream valve head attached to the stem to seal the inlet conduit an outlet, conduit in the valve head to permit flow from the pressure chamber to the valve passageway and a valve cap on the other end of the valve stem, the value head and valve cap being movable relative to one another. Also disclosed is a piston use in conjunction with …
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 October 18, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 18, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 18, 2011.
- 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.