Fluoropolymer solutions
CA 1289291 C · Owner: The Dow Chemical Company · Inventors: Birdwell, Jeffrey D.; Carl, William P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is a solution composition comprising a fluorinated polymer containing sites convertible to ion exchange groups dissolved in a solvent, wherein the densities of the fluorinated polymer and solvent are balanced. The most preferred solvent is 1,2-dibromotetrafluoroethane and has a boiling point of less than 110°C; and a solubility parameter of from greater than 7.1 to 8.2 hildebrands. The composition can be used to make ion exchange media films and articles for use in electrolytic cells fuel, cells and gas or liquid permeation units.
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
- Granted September 17, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 17, 2008.
- 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.