Biaxially oriented thermoplastic resin film
CA 2083080 A1 · Owner: Nakajima, Syoji · Inventors: Nakajima, Syoji; Okamoto, Katsuya; Abe, Koichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a biaxially oriented thermoplastic resin film formed by laminating a layer A composed of a thermoplastic resin A containing particles on at least one surface of a layer B composed of a thermoplastic resin B. The film has a specified ratio t/d of the thickness of the layer A "t" to the mean diameter of the particles contained in the thermoplastic resin A "d", a specified number of protrusions having a diameter of not less than 0.7µm and not more than 2.6 µm among protrusions existing on the surface of the layer A and a specified ratio L/S of a number S of protrusions having a smaller diameter to the number L of protrusions having a diameter in the above range. An excellent …
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 November 17, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 17, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 17, 2014.
- 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.