Addressable, semiconductor adaptable bragg gratings (asabg)
CA 2298251 C · Owner: Upton, Eric L. · Inventors: Wickham, Michael G.; Upton, Eric L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A Bragg grating device (10) is provided including a semiconductive optical waveguide (12) with a Bragg grating structure (14) formed along its length. A first, plurality of electrodes (16) are disposed on a first surface (18) of the optical waveguide (12), and individually communicate with select members of the Bragg grating structure (14). A, second plurality of electrodes (20) are disposed on a second surface (22) of the optical, waveguide (12) and individually communicate with select members of the Bragg grating, structure (14) such that individual electrodes of the second plurality of electrodes (20) are, electrically coupled to individual electrodes of the first plurality 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 February 8, 2000 and granted August 27, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 8, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 8, 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.