Inhibition of catalase activity in biological fluids
CA 2129117 C · Owner: Law, Wai Tak · Inventors: Law, Wai Tak; White, Mark D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In biological assays in which hydrogen peroxide is used as an oxidizing agent or wherein hydrogen peroxide is used to oxidize a dye or other intermediate to generate a detectable species the stability of the hydrogen peroxide in the presence of catalase and other enzyme which decomposes hydrogen peroxide is enhanced by the addition of a suitable inhibitor for the enzyme. When catalase is the enzyme to be inhibited catalase inhibitors that can be used in such biological assay systems include hydroxylamine salts such as hydroxylamine hydrochloride and hydroxylamine sulfate and sodium azide. The enzyme inhibitor can be incorporated in an integral analytic device.
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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 January 28, 1993 and granted January 5, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 28, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 28, 2015.
- 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.