Optical switch
CA 2307248 A1 · Owner: Paiam, Reza · Inventors: Paiam, Reza
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical switch is disclosed which operates as binary or digital switch. Two glass waveguides are, arranged in an X-like pattern such that they approach each other at a waist region without crossing, over one another. A polymer region contacts both waveguides at this waist region and has a, refractive index that can be changed more than that of the adjacent glass by applying heat. The, refractive index of the polymer can be varied from an index which is same as the glass waveguides;, to be less than that of the glass in which case the polymer acts as a cladding. When the index of the, polymer is lower than that of the glass through the application of heat light , launched into one …
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 27, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 27, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 27, 2022.
- 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.