Unfilled two-component polyurethane adhesive
CA 2222489 A1 · Owner: Dormish, Jeffrey F. · Inventors: Dormish, Jeffrey F.; Vanboxmeer, Douglas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a low-viscosity two-component unfilled polyurethane adhesive having a urethane content of from 10 to 18 percent by weight, based on the weight of nonfilled polyurethane polymer, based on, (a) a low-viscosity isocyanate component comprising an organic polyisocyanate in a quantity sufficient to provide an isocyanate index of about 100 to about 150; and, (b) a low-viscosity phase-stable curative component comprising (i) 5 to 50 equivalent percent of a polyether polyol and/or a polyether terminated by aromatic amino groups having an equivalent weight greater than 500, (ii) 30 to 95 equivalent percent of 2-methyl-1,3-propanediol and, (iii) 0 to 35 equivalent percent of …
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 November 27, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 27, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 27, 2019.
- 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.