Method of preparing spherical moldings
CA 2175690 C · Owner: Wada, Takuya · Inventors: Wada, Takuya; Nakaizumi, Masahiro; Sakakiyama, Shoji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention obtains a method which makes it possible to simultaneously injection-mold a number of spherical moldings without causing increase of runner loss and is a method of preparing spherical moldings by coupling molding forming parts with each other through a bridge of 0.1 to 10 mm2 in sectional area for feeding molten resin arranging a structure in which a plurality of molding forming parts are coupled with each other through the aforementioned bridge with respect to one gate and, performing molding, thereby obtaining a sphere series in which a plurality of spherical moldings 1 are coupled with each other through a bridge part 2.
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 19, 1995 and granted November 2, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 19, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 19, 2017.
- 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.