Injection molding nozzle device
CA 2067362 C · Owner: Matsumoto, Hiroyuki · Inventors: Yamaji, Teppei; Watanabe, Mitsuo; Horikoshi, Maki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention concerns an injection molding nozzle device 25 provided with an operating valve 31 installed movably in the axial direction inside a nozzle body 4 possessed of a resin passage 12 and enclosing therewith a fluid passage 10 incorporating therein a check valve 11. This injection molding nozzle device is furnished with a fluid discharge open-shut means capable of opening or shutting a fluid discharge passage 17 formed separately of the fluid passage 10 or the check valve 11 of the fluid passage 10.
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 August 1, 1991 and granted April 22, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 1, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 1, 2013.
- 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.