Wood preservative applicator
CA 2106572 C · Owner: Mcevoy, Christopher N. · Inventors: Chin, Chen-Woo; Mcevoy, Christopher N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention described is a wood preservative applicator or bandage for wooden structures such as wooden poles which wraps around the pole at ground level. The bandage comprises a inert matrix 2 which has a surface for contact with the wooden structure and has a plurality of reservoirs 3 formed therein. The reservoirs communicate with the surface of the matrix and contain a solid tablet of wood preservative chemical for supply to the matrix surface. The plurality of individual reservoirs are arranged on the flexible matrix to enable the matrix to be shaped to conform to the contour of the wooden structure. The bandage is also provided with a fastening means for securing the matrix in …
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 March 17, 1992 and granted February 13, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 17, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 17, 2014.
- 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.