Sheet-form, curable pressure-sensitive adhesive
CA 2205750 C · Owner: Sekisui Kagaku Kogyo Kabushiki Kaisha · Inventors: Fukui, Hiroji; Nakasuga, Akira
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sheet-form, curable pressure-sensitive adhesive is disclosed which includes a high molecular weight polymer (A) such as an acrylic polymer for constituting a pressure-sensitive adhesive component, a compound (B) containing an epoxy group, and a polymerization initiator (C) which is activated upon application of an activation energy such as a light to cause the compound (B) having an epoxy group to undergo a ring-opening polymerization.
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 May 21, 1997 and granted November 19, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 21, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 21, 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.