Fibers flash-spun from partially fluorinated polymers
CA 2242468 A1 · Owner: Waggoner, James Ross · Inventors: Waggoner, James Ross; Shin, Hyunkook; Armstrong, John Edward
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A flash-spun material comprised of at least 20 % partially fluorinated hydrocarbon polymers in which between 10 % and 70 % of the total number of hydrogen atoms in each hydrocarbon polymer are replaced by fluorine atoms. The partially fluorinated hydrocarbon polymers are preferably comprised of at least 80 % by weight of polymerized monomer units selected from ethylene tetrafluoroethylene, chlorotrifluoroethylene vinylidene fluoride and vinyl , fluoride. The flash-spun material may be a plexifilamentary strand or a microcellular foam. Also provided is a process for producing flash-spun material from partially fluorinated hydrocarbon polymers in a solvent and a solution from which …
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 January 9, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 9, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 9, 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.