System and method for optical chemical sensing
CA 2329783 A1 · Owner: Wu, Huan Ping · Inventors: Wu, Huan Ping
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention comprises a method for determining an analyte in which a dye solution is illuminated to induce a first and a second output light at a first and second wavelength, respectively, and the analyte concentration is determined from the measured first and second output intensities. The apparatus includes a probe (12) containing a dye solution a light source , (24), a frequency-sensitive photodetector (28) and a controller (90).
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 May 12, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 12, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 12, 2021.
- 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.