Optical waveguide having a hybrid core
CA 2291405 A1 · Owner: Delisle, Vincent · Inventors: Paiam, Reza; Diemeer, Mart
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention discloses an optical waveguide having a hybrid core useful in the, fabrication of a host of active and passive optical devices. The core is primarily inorganic, glass having a lesser portion of polymer grafted therein. Preferably the , polymer has a, substantially different thermo-optic coefficient. By appropriately selecting a polymer, with a suitable thermo-optic coefficient a temperature stable waveguide can be fabricated. Active devices having a smaller section of polymer can be realized with heaters for, varying the temperature and hence the refractive index of the polymer section.
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 December 2, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 2, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 2, 2021.
- 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.