Article and method for wood preservation
CA 1205698 A · Owner: Reilly Tar & Chemical Corporation · Inventors: Sowers, Edward E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An article and method for treating wood to promote preservation and inhibit fungi and bacteria attack, comprising the wood treated with a polymer with pendant groups containing pyridine rings complexed with copper. Treatment can include impregnating the wood through pressure, vacuum, soaking or other means or more superficial applications to the wood surface through brushing painting, dipping, or the like. Preferred are one-step and two-step procedures with poly-4-vinylpyridine as the polymer of choice and copper chloride or copper sulfate as the preferred copper ion source. Treatment can be with the monomer or homopolymer form, followed by polymerization and/or cross-linking in situ in the …
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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 June 10, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 10, 2003.
- 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.