Method and apparatus and screen for screening mechanical fibre pulp
CA 2425511 A1 · Owner: Juutinen, Vesa · Inventors: Hautala, Jouko; Juutinen, Vesa; Nieminen, Erkka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method, an apparatus and a screen for screening mechanical fibre pulp. According to the invention a short fibre material is separated using a gap screen, whereby said material can be very efficiently separated to form a specific fraction.
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 October 16, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 16, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 16, 2023.
- 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.