Method for immunoassay using photoacoustic spectroscopy
CA 2000817 A1 · Owner: Hitachi Instrument Engineering Co.Ltd · Inventors: Imai, Kyoko; Makiguchi, Hiroko; Nomura, Yasushi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In this invention, antigen-antibody complex is labeled with a color material and photoacoustic properties of the label are determined by photoacoustic spectroscopy. As the color material, a fluorescent substance, a dye or colored particles can be used. The immune reaction of the labeled antigen or antibody is carried out in liquid under the condition that the solid phase is present. As the result of immune reaction, the labeled antigen-antibody complex is immobilized on the surface of the solid phase. Then the solid phase is separated from the liquid and moved to the position for exposure to light and intermittently irradiated by the light. An acoustic signal given thereby is detected. …
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 October 16, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 16, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 16, 2011.
- 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.