Injection molding apparatus
CA 2014029 C · Owner: Yoshida, Hiroshi · Inventors: Yoshida, Hiroshi; Ito, Michio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An injection assembly for the injection molding of plastics and rubbers is disclosed which is comprised of a cylinder, a nozzle mounted at one end portion of the cylinder, a torpedo fitted at its one end to the nozzle and a plunger arranged to reciprocate in the cylinder. The torpedo has a hollow extension extending opposite to the nozzle and protruding in the cylinder, and the plunger is provided therein with an elongate aperture held in slidably movable relation to the extension of the torpedo. Uniform heating of the molding material is attainable at high speed.
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 April 6, 1990 and granted August 30, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 6, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 6, 2012.
- 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.