Non-toxic hydrophobic elastomeric polymer chemistry system for wood preservation
CA 2495835 C · Owner: Kovacs, Stephen · Inventors: Kovacs, Stephen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system and method for wood preservation comprises treating wood products via conventional pressure treating mechanics of sequential vacuum and pressure with a solution comprising an oligomeric stoichiometrically balanced blend of , primary and secondary diamines with modified diphenylmethane diisocyanates and a carrier solvent/reactant. Upon application the carrier solvent/reactant , evaporates allowing polymerization of the remaining solution constituents to form a non-toxic, hydrophobic, elastomeric polyureathane linked copolymer that provides a long-term barrier against rot environmental, termite and , mold/fungus attack. Complete polymer impregnation of the wood's interstitial …
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 August 20, 2003 and granted January 8, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 20, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 20, 2025.
- 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.