Sandwich immunoassay
CA 1254828 A · Owner: Immunomedics, Inc. · Inventors: Primus, Frederick J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Immunoassay system for determining the amount of a polyvalent ligand in a liquid test sample, and based on: (a) an insoluble phase to which is bound a separation specific binding substance which does not bind said ligand; (b) a capture specific binding substance which specifically binds said ligand, and which is itself specifically bound by said separation specific binding substance; and (c) a probe specific binding substance which specifically bind said ligand at a site which is accessible when said ligand is bound to said capture specific binding substance, said probe specific binding substance being not substantially bound by said separation specific binding substance, and being …
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
- Granted May 30, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 30, 2006.
- 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.