Slow-wave electrode structure
CA 2116538 C · Owner: Jgkb Photonics Inc · Inventors: Jaeger, Nicolas August Fleming; Lee, Zachary Ka Fai
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A slow-wave electrode structure suitable for use in integrated optical modulators having a pair of spaced substantially parallel integrated optical, waveguides in a compound semi-conductor substrate (such as gallium arsenide (GaAs) or indium phosphide (InP)) is formed by a pair of substantially parallel, conductor strips on the surface of the substrate each in a position for interaction, with its respective adjacent of said waveguides. The conductor strips are capacitively interconnected by narrow fins each integral with one of the strips and, extending between the strips whereby the conducting strips and fins may be applied as a single layer to the substrate. The narrow fins …
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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 September 1, 1992 and granted March 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 1, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 1, 2014.
- 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.