Extrusion coating process
CA 1160517 A · Owner: Permacel · Inventors: Korpman, Ralf; Palermo, Felice C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is concerned with a direct extrusion process for preparing a coating substrate from a viscous coating composition. The process of the invention comprises feeding the component material or materials of a coating composition into an extruder having a barrel and an elongated extrusion die orifice leading away from the barrel and advancing the material or materials forward in the extruder barrel to obtain a molten homogeneous composition and then, through the extrusion die orifice. A substrate is directed into positive engagement with the outlet opening defined by the extrusion die and the homogeneous composition is extruded through the extrusion die orifice onto the substrate to …
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 January 17, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 17, 2001.
- 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.