Adhesive composition
CA 2259990 A1 · Owner: Soken Chemical & Engineering Co. Ltd. · Inventors: Tomita, Koji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An adhesive composition is prepared from a major portion of (1) a carboxyl group-containing adhesive component having a weight average molecular weight of 800,000 or greater and a smaller amount of (2) an amino group-containing adhesion-improving component having a weight average molecular weight of 100,000 or less which is added to cross-link the component (1). The adhesive composition possesses excellent compatibility transparency, and adhesive , characteristics for plastics under normal and high temperatures while , controlling blistering, and is useful for producing plastic adhesive sheets plastic protective sheets, adhesive tapes double-coated adhesive tapes, adhesive labels or …
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 12, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 12, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 12, 2020.
- 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.