Ddi immunoassays, derivatives, conjugates and antibodies
CA 2088974 A1 · Owner: Sigma-Aldrich Company · Inventors: Stenglein, Kenneth J.; Murray, Dennis M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a method for the immunoassay of ddI (2',3'-dideoxyinosine), also known as didanosine in biological, fluids such as serum, semen plasma and urine, as well as other body fluids. The invention also includes: (1) various novel analogs of ddI useful in preparing immunogens for antibodies to ddI and in preparing labeled ddi, (2) immunogens for antibodies to ddI (3) , antibodies to ddI, (4) labeled ddI analogs and (5) diagnostic test kits for the immunoassay.
Read the whole patent
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 June 11, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 11, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 11, 2014.
- 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.