Method, composition and device for measuring the ionic strength or specific gravity of a test sample
CA 2115282 A1 · Owner: Zimmerle, Chris T. · Inventors: Zimmerle, Chris T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A method, composition and test device for determining the ionic strength or specific gravity of a test sample are disclosed. The method utilizes a test device comprising a test pad, wherein the test pad includes a carrier matrix incorporating a reagent composition capable of producing a detectable and measurable response that correlates to the ionic strength; and therefore the specific gravity of the, test sample. The reagent composition comprising a, strong polyelectrolyte, a metachromatic indicator dye and a suitable carrier, is incorporated into a carrier matrix to provide a test pad of a device useful in an ionic strength assay or a semiquantitative specific …
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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 February 9, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 9, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 9, 2016.
- 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.