Method and equipment for preserving wooden poles
CA 2451489 A1 · Owner: Nitunga, Libere · Inventors: Nitunga, Libere
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a method for preserving sap or more less dry wood which consists in impregnating the wood longitudinally and radially a longitudinal injection following the raw sap circuit for preserving the whole timber and a radial injection following the processed sap circuit for specific and more intense impregnation reserved for the part of the timber most exposed to biological alteration.
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 July 2, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 2, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 2, 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.