Method for quantitatively assaying the presence of diarrhetic shellfish poisoning toxins in marine samples
CA 2055935 A1 · Owner: National Research Council Of Canada · Inventors: Holmes, Charles
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a method for quantitatively assaying the presence of DSP toxins such as okadaic acid and dinophysistoxin-1 in marine samples. The method comprises the steps of preparing a marine extract fractionating the prepared marine extract and selecting the extract fraction containing the toxin to be assayed. Once the desired extract fraction has been selected a, labelled substrate for protein phosphatase and at least one protein phosphatase are added to the extract in an assay. The amount of toxin present is quantitatively measured by the ability of the extract fraction to inhibit catalysis, mainly dephosphorylation, of the labelled substrate by protein phosphatases, …
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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 November 21, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 21, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 21, 2013.
- 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.