1,2-disubstituted aromatic chelates
CA 2197883 C · Owner: Albion International, Inc. · Inventors: Ashmead, Harvey H.; Ashmead, Stephen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Mineral absorption is promoted in warm-blooded animals by means of a class of 1,2-disubstituted aromatic mineral chelates wherein the 1 and 2 substituents each donates a pair of electrons to a metal ion for formation of a five-member chelate ring. 2-Alkoxyphenols are particularly preferred. The chelates contain from one to three alkoxyphenol ligands with two ligands being preferred. A , preferred alkoxyphenol is vanillin and the minerals are selected from the group consisting of Mg, Ca, Cr, Mn, Fe Co, Cu, Zn, Mo and Se. Vanillin metal chelates have a slight to neutral taste and are absorbed more readily than , inorganic mineral salts.
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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 August 15, 1995 and granted June 19, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 15, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 15, 2017.
- 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.