Use of transition metal complexes with nitrogen-containing polydentate ligands as a bleaching catalyst and bleaching agent composition
CA 2490095 A1 · Owner: Dorfer, Astrid · Inventors: Kunz, Ulrike; Jakob, Harald; Del Grosso, Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Transition metal complexes are used as bleaching catalysts for peroxy compounds. Transition metal complexes to be used according to the invention contain a ligand of the general formula (I) wherein B is a bridge member such , as o-phenylene or pyridine-2,6-diyl and A represents the group -NH-CO-R1 or formula (II).
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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 May 30, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 30, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 30, 2025.
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Timeline
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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.