Isolation device between optically conductive areas
CA 2422572 A1 · Owner: Bookham Technology Plc · Inventors: House, Andrew Alan; Hopper, George Frederick; Day, Ian Edward
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An isolation device for providing optical and electrical isolating between optically conductive areas (1A, 1B9 such as parallel waveguides of an integrated optical chip comprising a first elongate region (4) doped with a first dopant material (p+), a second elongate region (5) on one side of the first elongate region (4) and a third elongate region (6) on the opposite side of the first elongate region (4), the second and third elongate regions (5 6) , being doped with a second dopant material (n+) of opposite polarity to the first dopant material (p+) so a first diode is formed between the second and first elongate regions (5, 4) and a second diode is formed between the first and …
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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 20, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 20, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 20, 2023.
- 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
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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.