Ligand and complex for catalytically bleaching a substrate
CA 2429629 C · Owner: Hage, Ronald · Inventors: Merz, Michael; Boerzel, Heidi; Kerscher, Marion
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a bleaching composition comprising: a) a monomer ligand or transition metal catalyst thereof of a ligand having the formula (I); wherein each R is independently hydrogen F, Cl, Br, hydroxyl, C1-, C4-alkylO-, -NH-CO-H -NH-CO-C1-C4-alkyl, -NH2, -NH-C1-C4-alkyl and C1-C4-, alkyl; R1 and R2 are independently selected from: C1-C4-alkyl C6-C10-aryl, and, a group containing a heteroatom capable of coordinating to a transition metal, wherein at least one of R1 and R2 is the group containing the heteroatom; R3 and R4 are independently selected from hydrogen C1-C8 alkyl, C1-C8-alkyl-O-C1-C8-alkyl C1-C8-alkyl-O-C6-C10-aryl, C6-C10-aryl C1-C8-, hydroxyalkyl, and …
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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 November 15, 2001 and granted May 31, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 15, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 15, 2023.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.