Water repellent and oil resistant composition
CA 2393346 A1 · Owner: Funaki, Hiroshi · Inventors: Funaki, Hiroshi; Seki, Ryuji; Furuta, Shoji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition which can impart excellent water repellency and oil resistance to paper even when dried at a low temperature in a short time. The composition comprises: a fluorocopolymer (A) obtained by polymerizing a polyfluoroalkylated (meth)acrylate, vinylidene chloride and a compound , represented, for example by CH2=C(R)COO-CH2-CH(OH)-CH2N+(CH3)3 X- (R is hydrogen or methyl and X- is a counter ion) with the aid of an oleophilic polymerization initiator (E) whose solubility in 100 g of water is less than 3 g; a non-fluorochemical surfactant (B); a medium (C); and a water-soluble polymer (D) (polyacrylamide, polyvinyl alcohol or starch).
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 October 10, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 10, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 10, 2023.
- 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.