Method for amplification of the response signal in a sandwich immunoassay
CA 2198958 C · Owner: Bayer Corporation · Inventors: Kuo, Hai-Hang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is an improvement to a sandwich type immunoassay in which there is immobilized to a solid support an antibody which is specific to an epitope of the analyte whose presence or concentration is being sought and a first labeled antibody which is specific to another epitope of the analyte. The improvement involves providing a second labeled antibody which is specific to the first labeled antibody to thereby form a chain of two or more labeled antibodies which results in amplification of the signal generated upon formation of the sandwich.
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 March 3, 1997 and granted December 30, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 3, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 3, 2019.
- 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.