A transdermal patch and a method for manufacture of a substrate sheet therefor
CA 2275539 A1 · Owner: Fujii, Kimihiro · Inventors: Tanaka, Kazuo; Ikeura, Yasuhiro; Yamasoto, Shinji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dermatological patch sheet obtained by bonding a polyalkylene terephthalate film to one side of a composite film made of a resin composition comprising 100 parts by weight of a polyvinyl chloride/polyurethane composite and 2 to 10 parts by weight of a styrene/ethylene/butylene/styrene copolymer through an adhesive layer to form a base sheet, forming a primer layer made of a saturated polyester resin on the surface of the polyalkylene terephthalate film of the base sheet, and superposing a medicataed pressure-sensitive adhesive layer made of a styrene/diene/styrene block copolymer on this primer.
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 October 26, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 26, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 26, 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.