Process for improving the impregnability of wood by pretreatment with fungi
CA 2304107 C · Owner: Fleck, Vinzenz · Inventors: Bruce, Alan; Fleck, Vinzenz; Rosner, Bernhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The object of the invention is a method for improving the impregnability of refractory wood species by pretreatment with fungi of the genera Trichoderma o Gliocladium or with weakly wood-degraging fungi. The pretreatment comprises a thermal treatment of the wood, the addition of a nutrient medium as well as an incubation phase to promote fungal growth. The incubation phase is stopped when the desired depth of penetration of the fungus is reached. The wood is subsequently impregnated with a wood impregnating agent. The typical result of the fungal pretreament is an increase in the depth of penetration of the impregnating agent to a depth of penetration of 5 mm to 30 mm required …
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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 September 19, 1997 and granted January 14, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 19, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 19, 2019.
- 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.