Non-invasive measurement of optically active compounds
CA 2249566 A1 · Owner: Lindberg, John M. · Inventors: Lindberg, John M.; Pezzaniti, J. Larry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus (8) and a process of determining the concentration of an optically active compound in a biological sample are provided. The process measures the entire polarization state of the sample and compares the measured polarization state of the sample to the polarization state of a sample having a known concentration of that compound. The polarization state of the sample is measured after manipulating the polarization state of light entering and leaving the sample and detecting the light leaving the sample. The apparatus (8) contains a source of light (10), a sample holder (14) for holding the biological sample, a detector (18), a first polarization manipulator (12) between …
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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 March 12, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 12, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 12, 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.