Process for reducing the pitch content in wood pulp
CA 2009622 C · Owner: Merritt, Johnnie E. Ii · Inventors: Farrell, Roberta Lee; Blanchette, Robert A.; Merritt, Johnnie E. Ii
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Case 118-7098/F/C, PROCESS FOR REDUCING THE PITCH CONTENT IN WOOD PULP Abstract of the disclosure, The invention relates to paper making industry and provides a process for reducing the resin content of wood which comprises applying an inoculum of a penetrating stain fungus to the wood in a systematic manner and maintaining environmental conditions effective for promoting the fungal growth.
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 8, 1990 and granted November 30, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 8, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 8, 2012.
- 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.