Valve
CA 2305657 C · Owner: Kramig, Heinrich · Inventors: Kramig, Heinrich; Unruh, Roland; Kesselhut, Rainer
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a valve fitted with a housing having an admission , and an exhaust line (1 11), which may separated from each other by an adjustable closing piece, wherein said piece rests on a valve seat (2) disposed diagonally in relation the direction of flow. The valve is embodied is such a way that the bearing surface (3) of the valve seat (2) is peripherally inclined in such a way thathe points of intersection of the diametrically opposing tangents (5-10 and 5a-10a) lying on the bearing surface (3) enclose a surface or the bearing surface (3) extends at a right angle in relation to the vertical line of the direction of flow.
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 16, 1998 and granted October 29, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 16, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 16, 2020.
- 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.