Urethane (meth)acrylate oligomer, process for its production and photo-curable composition
CA 2376203 A1 · Owner: Asahi Glass Company, Limited · Inventors: Kashiwame, Josho
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A urethane (meth)acrylate oligomer which has a low viscosity and gives a flexible cured article reduced in surface tackiness. It is obtained by reacting a polyol ingredient comprising a polyoxyalkylene polyol which has two to four hydroxyl groups, a hydroxyl value VOH (mg-KOH/g) of 5 to 115 and a , total degree of unsaturation VUS (meq/g) satisfying the relationship VUS<=(0.45/VOH)+0.02, with a polyisocyanate compound and a hydroxylated (meth)acrylate compound.
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 June 9, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 9, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 9, 2022.
- 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.