Black liquor viscosity control
CA 2212955 C · Owner: Harbinson, John N. · Inventors: Ellenor, David Todd; Harbinson, John N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Black liquor is subjected to high shear to cause a breakdown of macromolecules contained therein and provide a reduction in viscosity thereby improving the , processability of the black liquor and enabling the solids content to be increased.
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 February 23, 1996 and granted April 16, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 23, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 23, 2018.
- 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.