Radically polymerizable composition
CA 2017274 C · Owner: Kobayashi, Masao · Inventors: Ikenoue, Yoshiaki; Kobayashi, Masao; Saida, Yoshihiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a radical polymerizable composition comprised of a polymer having a .pi.-electron conjugated structure having repeating units of a mono-substituted or di-substituted isothianaphthene structure which is, represented by the formula Ia and/or Ib: and/or , wherein R1 and R2 represent hydrogen C1 - 18, alkoxy group, or -O(CH2CH2O)nCH3 n: 1 to 4 with the proviso that the case where both R1 and R2 represent hydrogen is excluded, X is an anion y is, from 0.01 to 1, and m is from 5 to 5,000 and a radical polymerizable compound. The radical polymerizable composition has a very stable electroconductivity in air and can be molded into an optional shape.
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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 May 22, 1990 and granted August 25, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 22, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 22, 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.