Information recording medium and adhesive composition therefor
CA 2024010 A1 · Owner: Kuroiwa, Mitsuyuki · Inventors: Kuroiwa, Mitsuyuki; Nanbu, Hirosi; Todo, Akira
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Title or the Invention, INFORMATION RECORDING MEDIUM AND ADHESIVE COMPOSITION THEREFOR, Abstract of the disclosure An information recording medium formed by adhering, with an adhesive composition two disk sub-, strates to each other, at least one of the two disk substrates having a recording layer on at least one surface of a transparent resin substrate thereof and the adhesive composition comprising, (1) the -following components: (A) an .alpha.-olefin polymer, (B) an ethylene/(meth)acrylate copolymer (C) a styrene-type polymer, and, (D) a tackifier provided that at least one of the components (A) to (D) is modified with an unsaturated carboxylic acid or a derivative thereof, or, (2) the …
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 August 24, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 24, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 24, 2012.
- 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.