Method of manufacturing a foam-molded product
CA 2377510 C · Owner: Murakoshi, Hidekazu · Inventors: Tamura, Shingo; Matsuoka, Ichiro; Murakoshi, Hidekazu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved method of manufacturing a foam-molded product is provided including the steps of: filling a resin containing a foaming agent into a mold cavity by injection within a time period from a time point just before completion of mold clamping to a time point after the completion of mold clamping allowing the resin thus filled in the mold cavity to form a skin layer over a surface thereof thereafter retracting a movable mold to define a predetermined cavity clearance between the movable mold and a stationary mold so as to cause the foaming agent contained in an uncured portion of the resin to foam and cooling the resin filled in the cavity mold to form a foam-molded product having a …
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 19, 2002 and granted November 15, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 19, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 19, 2024.
- 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.