High barrier pctfe film
CA 2118926 A1 · Owner: Alliedsignal Inc. · Inventors: Schneider, Russell L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Oriented poly(chlorotrifluoroethylene) based films comprising up to 1 pourcent by weight of copolymerizable comonomers as well as oriented poly(chlorotrifluoroethylene) films formed essentially of a homopolymer comprising no copolymerizable comonomers are provided; all of the films are formed from low zero strength time film forming resin compositions which are highly amorphous in nature, and which are subjected to a process which includes the steps of: preheating the film above its glass transition temperature stretching the film to provide a film having a stretched:unstretched ratio of between about 2:1 to about 5:1 followed by , annealing the film. The films feature 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 September 23, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 23, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 23, 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.