Immunoassay for homocysteine
CA 2188752 C · Owner: Van Atta, Reuel B. · Inventors: Van Atta, Reuel B.; Goodman, Thomas C.; Ullman, Edwin F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention pertains to methods to detect a compound in the presence of a homolog that is immunologically related to the analyte. The invention is particularly suited for the detection of homocysteine in the presence of cysteine. The methods of this invention involve chemically modifying both the analyte and the homolog to increase their immunogenicity and facilitate antibody recognition. More importantly, this modification is done to make these compounds immunologically distinct. Antibodies to the immunologically distinct compounds are then prepared. An assay protocol comprises chemically modifying the analyte and homolog and then immunochemically detecting the modified analyte by means …
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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 April 27, 1995 and granted August 6, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 27, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 27, 2017.
- 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.