Coated fibrous web and process for the production thereof
CA 2444085 C · Owner: Meuronen, Jari · Inventors: Meuronen, Jari; Silenius, Petri; Leskela, Markku
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a coated fibrous web and a method for producing it. , According to the present invention a coated fibrous web comprises a fillercontaining base , web that has a pigment-containing coating layer on at least one surface. The filler of the , base web consists at least partially of cellulose or lignocellulose fibrils on the surface of , which light scattering material particles have been deposited. The filler comprises , cellulose or lignocellulose fibrils having an average thickness less than 5 µm produced , from plant fibre by refining and screening. Considerable advantages are achieved with the , present invention. With the help of the composite filler …
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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 April 24, 2002 and granted November 22, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 24, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 24, 2024.
- 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.