Method for improving the durability, dimensional stability and surface hardness of a wooden body
CA 2501052 C · Owner: Krause, Andreas · Inventors: Militz, Holger; Krause, Andreas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a method for improving the durability dimensional stability and , surface hardness of a wooden body wherein an untreated wooden body is , impregnated with an aqueous solution consisting of A) an impregnating agent from the group of 1,3-bis(hydroxymethyl)-4,5-dihydroxyimidazolidinone-2 1,3-, bis(hydroxymethyl)-4,5-dihydroxyimidazolidinone-2 1,3-dimethyl-4,5-, dihydroxyimidazolidinone-2 dimethylol urea modified with a C1-5 alkohol a , polyol or mixtures thereof, bis(methoxymethyl) urea tetramethylolacetylenediurea, 1,3-bis(hydroxymethyl)imidazolidinone-2 methylolmethyl urea or the mixtures thereof and B) consisting of a catalyst from the group of metal or ammonium salts organic …
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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
- Filed October 1, 2003 and granted July 9, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 1, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 1, 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
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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.