Synergistic wood preservative compositions
CA 2392680 C · Owner: Kovacevic, Stevo B. · Inventors: Kovacevic, Stevo B.; Kovacevic, Snezana B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to the synergistic wood preservative composition comprising of a quaternary ammonium compound and N-substituted isothiazolones having the properties of providing effective and broader control of microorganisms that produce stain can cause the deterioration of wood, or may develop resistance to some of the active components.
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 15, 2002 and granted September 9, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 15, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 15, 2024.
- 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.