Extrusion of materials
CA 2096142 A1 · Owner: Hellenic Plastics And Rubber Industry Menelaos Petsetakis S.A. · Inventors: Petsetakis, Menelaos
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
57)Abstract, An apparatus and method are disclosed for extruding a product which comprises a longitudinal component e.g. a tubular sheet and/or longitudinal filaments in a circular array and transverse filaments which, follow a helical path relative to the longitudinal component whereby the, product may consist of a lattice or a reinforced sheet material. The transverse filaments are formed by cooperation between two die parts (101; 102) to which relative movement is imparted so that one part (102) performs a rocking motion progressing around a circular path to influence the extrusion orifice, without rotation of the die parts. The extrusion orifice may comprise an annular slot defined …
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 17, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 17, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 17, 2014.
- 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.