Foam dispensing pump container
CA 2117054 C · Owner: Matsura, Masako · Inventors: Matsura, Masako; Uehira, Shoji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A foam dispensing pump container, for dispensing foam by mixing air pumped from an air cylinder by an air piston having suction holes in its upper wall and a foamable liquid pumped from a liquid cylinder by a liquid piston having an annular projection on its outer wall provided with an elastic valve member including a cylindrical wall portion an outer thin annular valve portion extending outwardly from the cylindrical wall portion and an inner thin annular valve portion extending inwardly from the cylindrical wall portion. The elastic valve member is arranged such that the cylindrical wall portion is in contact at least partially with an inner surface of the upper wall between the suction …
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 March 4, 1994 and granted September 14, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 4, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 4, 2016.
- 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.