Method for manufacturing polymer optical waveguide
CA 2325679 A1 · Owner: Shioda, Tsuyoshi · Inventors: Shioda, Tsuyoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polymer optical waveguide includes a lower cladding layer of a polymer resin which has a recess and projection transferred from a mold provided with a recess and projection for forming a core portion of the optical waveguide by applying a polymer in molten state or in solution on the mold and curing the polymer, by ultraviolet rays or by heat and stripping the cured polymer, from the mold in a liquid. The cured polymer can be easily stripped from the mold, which allows the mass manufacturing of polymer optical waveguides having various film thicknesses.
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 November 10, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 10, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 10, 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.