Self-cleaning tree girdling device
CA 1136858 A · Owner: Vredenburg, Edric W. Sr. · Inventors: Vredenburg, Edric W. Sr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In my co-pending Canadian application Serial No. 321,063 of February 7, 1979, I disclosed an improved device for "girdling" trees. That device effectively removes a complete circular band of bark and all that underlies the bark to the central portion of the tree so that fluid cannot pass from the root system of the tree to the upper portion of the tree whereby, with the elimination of such fluid transmission the tree, dies. In many areas, such girdling is practiced widely as a method of improving the ecology of the area for the dead trees are readily removed by being pushed over by a bulldozer. This invention relates to a construction of such a girdling device whereby the bark or other …
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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
- Granted December 7, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 7, 1999.
- 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.