Reactive hot-melt elastic sealant composition
CA 2047160 C · Owner: Sunstar Giken Kabushiki Kaisha · Inventors: Ito, Masahiro; Takada, Masaharu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A reactive hot-melt elastic sealant composition comprises (A) a polyurethane prepolymer prepared by reacting a polyether polyol having a hydroxyl group at the terminus and having an average molecular weight of 6,000 to 40,000 and an excess amount of a polyisocyanate compound and (B) a, thermoplastic urethane multi-block copolymer resin in, admixture with conventional additives. The composition has excellent durability, cold resistance, initial adhesive force and the maintenance of the adhesive force for a long period of time, and is particularly useful for the adhesive sealing of parts in automobiles.
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 July 16, 1991 and granted June 25, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 16, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 16, 2013.
- 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.