Substituted metallocenes for use as anodic electrochromic materials, and electrochromic media and devices comprising the same
CA 2399893 C · Owner: Guarr, Thomas F. · Inventors: Guarr, Thomas F.; Lomprey, Jeffrey R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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An electrochromic device (100) comprising at least one substantially transparent substrate (120) having an electrically conductive material (120 118) associated therewith, and an electrochromic medium (124) which comprises a solvent, a cathodic material, and an anodic electrochromic material represented by formula (I) wherein R1-R10 are the same or different and at least three of R1-R10 are the same or different and comprise a straight or branched alkyl, aryl, alkaryl, or aralkyl group containing approximately 1 to approximately 40 carbon atom(s), and/or a silyl or siloxyl group containing approximately 1 to approximately 40 silicon atom(s) wherein the carbon or , silicon atom(s) may …
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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 February 24, 2001 and granted December 17, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 24, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 24, 2023.
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