Wood glue powder
CA 2202383 C · Owner: Figge, Rainer · Inventors: Schilling, Bernd; Selig, Manfred; Figge, Rainer
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A wood glue powder which is easily dispersible in water is provided having improved bond strength thermal stability and, rapid setting properties and is prepared by mixing aqueous dispersions, prepared by emulsion polymerization technique of: a) from 70 to 90% by weight of one or more vinyl ester homopolymers or Vinyl ester copolymers of vinyl esters of unbranched or branched alkylcarboxylic acids having 1 to 18 carbon atoms, with, b) from 10 to 30% by weight of one or more fully hydrolyzed vinyl alcohol homopolymers or vinyl alcohol copolymers having a degree of hydrolysis of from 96 to 100 mol% and a Hoppler viscosity of from 2 to 15 mPa.s, measured in 4% strength aqueous solution, based …
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 December 7, 1995 and granted July 31, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 7, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 7, 2017.
- 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.