Detection assays having chromogenic and nonchromogenic, hypochromogenic, bathochromogenic or hypsochromogenic substrates
CA 2037562 A1 · Owner: Yun, Shyun-Long · Inventors: Yun, Shyun-Long; Vlastelica, Daniel L.; Hatch, Robert P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to enzyme detection assay compositions and methods which have chromogenic and nonchromogenic, hypochromogenic, bathochromogenic or hypsochromogenic substrates. By using both chromogenic and nonchromogenic, hypochromogenic batho-, chromogenic or hypsochromogenic substrates assay sensitivity can be controlled and the need for sample predilution eliminated. In one embodiment of the invention an assay for the estimation of serum cholinesterase activity is provided.
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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 5, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 5, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 5, 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.