Phthalocyanine compounds and usage thereof
CA 2071474 A1 · Owner: Sugimoto, Kenichi · Inventors: Aihara, Shin; Sugimoto, Kenichi; Karasawa, Akio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Phthalocyanine compounds represented by the below-described formula are suitable for use in the fabrication of color filters. wherein R1 R4, R5, R8, R9, R12, R13 and R16 represent a group represented by the below-described formula H, or a halogen atom, R2, R3, R6, R7, R10 R11, R14 and, R15 represent an alkyl, alkoxyl alkylthio, alkylamino, dialkylamino or aryloxyl arylthio group or -COORl7, R17 being a particular monovalent group H or a halogen, atom; and Met represents a metal atom. wherein X and Z represent 0 or S R18, R19 and R20, represent H or an alkyl group A, B and D represent a, connecting group n and ? is an integer of 0-10, m, q, t u, r and w are an integer of 0-2, and p is 0 or 1.
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 June 17, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 17, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 17, 2014.
- 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.