Expired Canadian patentCanada
Measurements of optical inhomogeneity and other properties in substances using propagation modes of light
CA 2528417 C · Owner: Wang, Feiling · Inventors: Wang, Feiling
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This application describes designs, implementations and techniques for , controlling propagation mode or modes of light in a common optical path which , may include one or more waveguides (272) to sense a sample (205).
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 June 4, 2004 and granted September 11, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 4, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 4, 2026.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 4, 2004
GrantedSeptember 11, 2012
Term endedJune 4, 2024
Patent numberCA 2528417 C
Classification (IPC)G01J4/00 +1 more
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.