Optical waveguide module
CA 2473222 A1 · Owner: Sumitomo Electric Industries, Ltd. · Inventors: Yamabayashi, Naoyuki; Fujimura, Yasushi; Komiya, Takeo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A reflection filter (4) is installed on the inner side of a slant groove (3) formed so as to cross an optical waveguide (2n) in a flat waveguide type optical circuit (1). Light reflected off the reflection filter (4) is detected by the optical detector (61n) of an optical detector array (60) to monitor the light intensity of a signal light. A sub-mount substrate (70) is installed on the upper surface side of the optical circuit (1) in association with the optical detector (61n), and the optical detector array (60) is held by an optical detector mounting surface (71) tilted at an angle .alpha. (0~ < .alpha. < 90~) with respect to the top surface of the optical circuit (1) so that …
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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 January 15, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 15, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 15, 2025.
- 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.