Extrusion machine
CA 2116271 C · Owner: Lihotzky-Vaupel, Wolfram · Inventors: Czarnetzki, Robert; Lihotzky-Vaupel, Wolfram
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An extrusion machine has a machine frame an extrusion press, with a material inlet opening and a material outlet opening a drive for the extrusion press and a die located in the vicinity of the material outlet opening and a cutting tool associated with said drive. A changer mechanism is provided in the extrusion press, which has a support member for at least two changeable dies and/or cutting tools the support, member being movably located in a plane substantially parallel to the plane of the material outlet opening relative to the extrusion press.
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 February 23, 1994 and granted June 30, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 23, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 23, 2016.
- 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.