Biaxially orientated laminated polyester film
CA 2086068 A1 · Owner: Masuda, Narihiro · Inventors: Masuda, Narihiro; Masuda, Narihiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A biaxially orientated laminated polyester film having at least two layers, at least one outermost layer of which contains 0.1 to 5.0 % by weight of aluminum oxide particles (A) having an average primary particle size of 5 to 40 nm and 0.3 to 10 % by weight of particles (B) having an average primary particle size of 10 to 100 nm which are other than aluminum oxide particles, wherein an existence probability of discrete primary particles of the particles (A) and (B) in the outermost layer is not larger than 50 % the outermost layer has a surface roughness Ra of 5 to 25 nm, and a ratio of a height Rt of the largest protuberance to Ra (Rt/Ra) is not larger than 15, which film has good smooth …
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 December 22, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 22, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 22, 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.