Test media and quantitative method for identification and differentiation of biological materials in a test sample
CA 2250174 C · Owner: Bontrager, Gordon L. · Inventors: Roth, Jonathan N.; Bontrager, Gordon L.
Overview
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A test method and medium for quantitatively identifying and distinguishing biological materials in a test sample. A first biological material has enzyme specificity for a first chromogenic substrate a second biological material , has enzyme specificity for a second chromogenic substrate and a third , biological material has specificity for one of the substrates. The chromogenic substrates form respective first and second colored water insoluble compounds upon reaction with specific enzymes. The first and second biological materials are capable of fermenting a sugar, and the third biological material does not ferment the sugar. The test medium is adjusted to a pH conducive for color …
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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 March 21, 1997 and granted September 16, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 21, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 21, 2019.
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