Refiner for processing a fiber stock suspension for paper fabrication
CA 1302765 C · Owner: Sulzer Escher Wyss Gmbh · Inventors: Sepke, Paul-Wilhelm
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Attorney's Docket No. 7868 CAN, INVENTOR: PAUL-WILHELM SEPKE INVENTION: REFINER FOR PROCESSING A FIBER STOCK SUSPENSION FOR PAPER FABRICATION, ABSTRACT OF THE DISCLOSURE The refiner for processing a fiber stock suspension for paper fabrication comprises at least one substantially planar grinding disc equipped with a conventional set of grinding tools. This substantially planar grinding disc coacts with a perforated plate. The perforations or holes of the perforated plate are provided at a side of the perforations or holes which confronts the grinding disc with grinding edges suitable for achieving a desired refinement processing or treatment of the fiber stock suspension. These perforations …
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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
- Granted June 9, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 9, 2009.
- 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.