Norbixin adducts with water-soluble or water-dispersible proteins or branched-chain or cyclic polysaccharides
CA 2028156 C · Owner: Todd, Paul H. Jr. · Inventors: Todd, Paul H. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A norbixin complex with a water-soluble or water-dispersible branched-chain or cyclic polysaccharide or a water-soluble or water-dispersible protein which, will not precipitate upon standing in water which, gives an essentially stable bright reddish or magenta solution in water, and from which complex norbixin cannot be removed by centrifugation, as well as a process for preparing such a complex of norbixin and a substrate, selected from a water-soluble or water-dispersible branched-chain or cyclic polysaccharide and a water-soluble or water-dispersible protein by, contacting the substrate and norbixin in an aqueous solution at an alkaline pH, e.g. above about 8.5 at, which pH the norbixin …
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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 October 22, 1990 and granted February 13, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 22, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 22, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.