Non-invasive blood glucose measurement system
CA 2097602 C · Owner: Tarr, Randall V. · Inventors: Steffes, Paul G.; Tarr, Randall V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Stimulated Raman spectroscopy is used to non-invasively measure the concentration of a Raman active molecule preferably D-glucose in the ocular aqueous humor of living being. The apparatus and method make use of two monochomatic laser beams, a pump laser beam and a probe laser beam. The output power of the pump laser beam is amplitude modulated combined, with the probe laser beam and directed into the ocular aqueous humor. The introduction of the laser beams into the ocular aqueous humor induces scattered Raman radiation which causes a portion of the energy at the pump frequency to shift over to the probe frequency. The pump and probe laser beams are then detected as they exit the ocular …
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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 November 12, 1991 and granted August 11, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 12, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 12, 2013.
- 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.