Polyaniline compositions, process for their preparation and uses thereof
CA 2067142 C · Owner: The Ohio State University Research Foundation · Inventors: Epstein, Arthur J.; Yue, Jiang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Self protonated sulfonic acid substituted polyaniline compositions processes , for their preparation and uses thereof. The sulfonated polyaniline compositions are useful for conduction of electricity absorption of electromagnetic radiation modulation, of electromagnetic beams and modification of the electromagnetic response of sulfonated polyaniline compositions by chemical or electrochemical means. The sulfonated polyaniline compositions are also useful as a high density erasable data storage medium for use in information storage and process applications. The sulfonated polyaniline compositions provide electronic chemi-, cal, electrochemical and optionally microelectronic devices which …
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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 15, 1990 and granted April 16, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 15, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 15, 2012.
- 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.