Measuring molecular change in the ocular lens
CA 2113268 C · Owner: Bursell, Sven-Erik · Inventors: Eppstein, Jonathan A.; Yu, Nai Teug; Patterson, Scott W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus and methods for noninvasively diagnosing diabetes mellitus, the, prediabetic condition cataracts, and other, diseases in the human (or other) body are disclosed. Diagnoses are made by illuminating ocular lens (L) or other tissue with a narrowband light source (15) at a selected wavelength separating the backscattered radiation into fluorescent and Rayleigh components (55, 135), detecting (85) the backscattered radiation intensity at the peak of the fluorescent response, and normalizing the detected value with the detected intensity of its Rayleigh component. Measurements provided in this manner can be used as improved indicators of the presence or absence, of certain diseases or …
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 July 16, 1992 and granted January 12, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 16, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 16, 2014.
- 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.