Chromogenic merocyanine enzyme substrates
CA 2000596 C · Owner: Yip, M. Teresa · Inventors: Yip, M. Teresa; Corey, Paul F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Chromogenic merocyanine enzyme substrate compounds of the general formula:, (see formula I) where Y is an enzymatically-cleavable group such as a radical of a sugar, carboxylic acid, amino acid peptide, phosphoric acid, or sulfuric acid; A and B represent residues that complete 5- or 6-membered ring systems; R1 is substituted or unsubstituted alkyl; R2 and R3, independently, are hydrogen or lower alkyl; m, n, and p, which can be different are intergers from 0 through 3 provided that m + n + p must be at least 2; and x is an appropriate counterion (anion). These components are useful as optical indicator compounds in analytical test systems for example for the detection of enzymes in a …
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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 12, 1989 and granted December 5, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 12, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 12, 2011.
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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.