Frustrated total internal reflection switch using waveguides and method of operation
CA 2357175 A1 · Owner: Optical Switch Corporation · Inventors: Jurbergs, David C.; Karaguleff, Chris
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical switch for processing an optical signal includes an input waveguide having a reflective surface a, first output waveguide coupled to the input waveguide and, a second output waveguide. The second output waveguide has a first position spaced apart from the reflective surface of the input waveguide such that the reflective surface totally internally reflects an optical signal toward the first output waveguide. The second output waveguide has a second position in proximal contact with the reflective surface to frustrate the total internal reflection of the optical signal such that the second output waveguide receives the optical signal.
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 September 10, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 10, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 10, 2023.
- 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.