Multimode interference based light reflecting device with polygonal loop
CA 2356876 A1 · Owner: Augustsson, Torsten · Inventors: Augustsson, Torsten
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for reflecting light waves to be used when building optical systems for various applications and special devices is built on a substrate and has , a planar structure. It comprises a light power coupler (1) of the MMI-type configured as a rectangular plate at or in the surface of the substrate. The coupler splits light incoming on an input terminal into two equal portions each portion delivered on an output terminal. Also the coupler combines light incoming on two output terminals into combined light delivered on the input terminal. A loop is connected to the two output terminals for conducting light delivered on each one of these output terminals back into the other one of …
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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 December 21, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 21, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 21, 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.