Monitoring blood substances using self-sampled tears
CA 2481501 A1 · Owner: Cui, Gang · Inventors: Cui, Gang; Cohan, Bruce E.; Cha, Geun Sig
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for non-invasively determining the concentration of a substance in blood, such as glucose, include a sample portion (12) arranged for contacting an eye region of a user to obtain a tear fluid sample a sensor , (21) in communication with the sample portion (12) for generating a signal related to the tear substance concentration and a processor (44) in , communication with the sensor (21) for determining a blood substance concentration corresponding to the tear substance concentration.
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 April 1, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 1, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 1, 2025.
- 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.