Poly (ethylene 2,6-naphthalate) film
CA 2092224 A1 · Owner: Diafoil Hoechst Company, Limited · Inventors: Kunugihara, Kazuhiro; Fujimoto, Masahiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A poly(ethylene 2,6-naphthalate) film obtained by stretching a poly(ethylene 2,6-naphthalate) sheet containing cross-linked polymer particles which have at least one ethylene glycol unit and have an average particle size of from 0.05 to 3 µm and a spherical ratio of from 1.0 to 1.1 wherein a deformation ratio of the cross-linked polymer particles in the stretching is from 1.2 to 3.0 has, excellent runnability, abrasive resistance and strength.
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 March 23, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 23, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 23, 2015.
- 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.