Wood preservative composition
CA 1188459 A · Owner: Kao Corporation · Inventors: Inoue, Shigeo; Nakai, Ryozo; Arai, Sumio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed herein is a wood preservative composition comprising the following ingredients (A) and (B): (A) at least one alkyl ammonium compound (B) at least one polyacid salt selected from the group consisting of condensed homopolyacid salts condensed, heteropolyacid salts, polycarboxylic acid salts and polyphosphonic acid salts. The (B) ingredients improve the anchoring property of the alkyl ammonium compound (A) which is the active ingredient of a wood preservative, whereby there is obtained a wood preservative with long-lasting preservation effect under the conditions of underground burial or under water installation.
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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 11, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 11, 2002.
- 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.