Electrochromic solution containing hydrazone compound and device manufactured with same
CA 2401309 A1 · Owner: Exon Science Inc. · Inventors: Wang, Fu-Shing; Hsu, Kuang-Mei
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electrochromic solution includes a hydrazone compound as an anodic compound is disclosed. The hydrazone compound has a general formula (I) where R1, R2, R3 and R4 are individually selected from a group consisting of hydrogen, alkyl containing 5 to 20 carbon atoms alkenyl containing 2 to 20 , carbon, atoms alkynyl containing 2 to 20 carbon atoms and aryl containing 5 to 20 , carbon, atoms which are unsubstituted or optionally substituted with one or more ester, ether, aryl, amine, thioester, alkyl alkoxy, alkene, alkyne, CN, F, Cl, Br, I and/or organometallocene functional group.
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
- Filed September 4, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 4, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 4, 2024.
- 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.