Process for fluorinating cellulosic materials and fluorinated cellulosic materials
CA 2250122 A1 · Owner: Daikin Industries, Ltd. · Inventors: Yamaguchi, Fumihiko; Sakamoto, Eiji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Fluorinated cellulosic materials prepared by a process of reacting a cellulosic material selected from the group consisting of cellulose materials and lignocellulose materials with at least one fluorine compound selected from among fluorinated olefins, fluorinated acrylates and fluorinated methacrylates in the presence of a catalyst in an organic solvent wherein not only the , surface but also the inside are modified to thereby attain enhancement in the functions.
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 28, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 28, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 28, 2019.
- 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.