A method of preparing thin layers of conductive polymers
CA 2000431 C · Owner: Zipperling Kessler & Co. (G.M.B.H. & Co.) · Inventors: Merkle, Holger; Wessling, Bernhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the production of mouldings from intrinsically conductive polymers as conductive layer components with a specific conductivity of more than -2 S/cm is disclosed. If necessary they can contain other materials as the substrate. The conductive component is formed by deposition from a meta-stable dispersion of the intrinsically conductive polymers. A dispersion of insoluble organic polymers suitable for this process is also provided. The polymers are converted by oxidation agents or acids into an electrically conductive form in aqueous or, organic media with a solubility parameter equal to or more than 8.6 cal/cm 31/2. The material can be filtered without discoloration through a …
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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 11, 1989 and granted January 25, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 11, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 11, 2011.
- 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
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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.