Two-component polyurethane adhesive for wooden materials
CA 2438748 C · Owner: Kohlstadt, Hans-Peter · Inventors: Gruenewaelder, Bernhard; Thiele, Lothar; Te Poel, Andre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The polyurethane adhesive is based on a polyol component A consisting of, a) 10 to 98 wt.% of at least one oleochemical polyol b) 1 to 7.5 wt% of at least one diol having a hydroxyl value of 400 to 2000 and, c) 1 to 7.5 wt.% of at least one tritetra- or , pentafunctional polyol having a hydroxyl value of 200 to 2000, the wt.% in each case being based on the whole of the polyol mixture, and, the polyisocyanate component B) the NCO/OH ratio of , components A) and B) being within the range of 1.5 to 0.9. The addition to the polyol component of 0 to 60 wt.% based , on the whole of the polyol mixture of a homogeneously , dissolved resin brings about a sharp increase in the adhesive …
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 February 9, 2002 and granted June 7, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 9, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 9, 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.