Method for the determination of the stresses occurring in wood when drying
CA 2633499 C · Owner: Lappalainen, Reijo · Inventors: Tiitta, Markku; Lappalainen, Reijo; Miettinen, Pekka
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 method for the determination of the stresses occurring in wood when drying or being dried. With the method in accordance with the invention, electrodes (1) are used to generate an electric field in drying wood (2) in order to measure the electric complex spectrum using the impedance spectroscopy method while at the same time employing sensors (3) to measure acoustic emissions from drying wood and using the results for calculating the parameters required for determining the stress state existing in the wood and for monitoring and/or controlling the drying process.
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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 8, 2006 and granted February 17, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 8, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.