Transfer imaging using metal-azo and metal-azomethine dyes
CA 2060671 A1 · Owner: Smith, Terrance P. · Inventors: Chang, Jeffrey C.; Smith, Terrance P.; Macomber, David W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Dye donor sheets comprising a substrate having a coating comprising a binder and at least one neutral 1:1 metal-azo or neutral 1:1 metal-azomethine dye having the general structure:, wherein, Z1 and Z2 each independently represent an arene nucleus having from 5 to 14, ring atoms;, G1 and G2 each independently represent a metal ligating group and further, wherein G1 and G2 may be contained within or pendant from at least one of Z1 and Z2;, R represents a hydrogen atom, a halogen atom an alkyl group, an acylamino, group, an alkoxy group a sulfonamido group, an aryl group, a thiol group an, alkylthio group, an arylthio group an alkylamino group, an arylamino group an, amino group, an …
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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 5, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 5, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 5, 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.