Immunoassay using magnetic particle
CA 2026515 C · Owner: Ashihara, Yoshihiro · Inventors: Okada, Masahisa; Oishi, Masao; Yoshioka, Katsuaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An immunoassay method using magnetic particles comprising a core and a coating layer on the surface thereof. The core comprises an organic polymer and the coating layer comprises an iron oxide type ferrite coating layer. An antigen or an antibody is bound onto the surface of the coating layer, and the particle has a particle size of 0.2 to 3 µm.
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 September 28, 1990 and granted December 25, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 28, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 28, 2012.
- 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.