Method for molding multicolored silicone rubber articles
CA 1237863 A · Owner: Toray Silicone Company, Ltd. · Inventors: Hamada, Mitsuo; Shimizu, Koji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, Simultaneous molding of multicolored articles is accomplished by filling the cavities of an open mold with a plurality of differently colored, pumpable silicone rubber compositions using a single injector. The mold is then assembled and headed to cure the silicone rubber composition contained in the mold cavities and in a connecting clearance formed above the mold cavities when the mold is assembled. (TOR6:1)
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
- Granted June 14, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 14, 2005.
- 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.