Variable section extrusion die set and variable extrusion molding method
CA 2181538 C · Owner: Kamibayashi, Atsushi · Inventors: Sano, Shigeo; Hiyoshi, Yasumasa; Kato, Masatsugu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A molded product with a variable cross sectional configuration in the longitudinal direction is subjected to extrusion molding by using a die set for extruding a molding with a variable section in a longitudinal direction the die set, comprising a first die 10 and a second die 11 the first die, and the second die 11 being relatively movably disposed along the web shaping-holes 16 and 28 and arranged in order in the extruding direction of a molding material such that a first extrusion hole 14 and a second extrusion hole 30 have web shaping-holes 16 and 28 communicated with each other and a flange portion shaping-hole 15 (27) of one of the dies is situated on the side of a flange portion …
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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 January 10, 1996 and granted October 28, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 10, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 10, 2018.
- 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.