Method for molding saturated crystalline polyesters and molding equipment therefor
CA 2005995 C · Owner: Mitsui Petrochemical Industries, Ltd. · Inventors: Tomita, Kunio; Niimi, Hiroji; Satake, Takashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In accordance with the present invention there are, provided processes for molding saturated crystalline polyester resins into a desired shape by supplying said resins to a molding machine, which processes are characterized in that the starting saturated crystalline polyester resin is heated in the molding machine to a temperature above its melting point and allowed to reach in a substantially molten state to a compression section of the molding machine, thereby molding the melted starting resin into the desired shape, or the starting saturated crystalline polyester resin is heated to a temperature above its melting point to bring to a substantially molten state and supplied to the molding …
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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 December 19, 1989 and granted March 22, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 19, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 19, 2011.
- 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.