Solid state device for generating electromagnetic wave in terahertz-band
CA 2184682 C · Owner: Kadoya, Yutaka · Inventors: Yamanishi, Masamichi; Kadoya, Yutaka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
For generating a highly efficient monochromatic terahertz-band electromagnetic wave, a solid state device including on a compound semiconductor single crystal substrate, a first distributed Bragg reflector an exciton generating region provided on the first distributed Bragg reflector, and a second distributed Bragg reflector provided on the exciton generating region to constitute a resonator. A pulsed light wave is made incident upon the device to generate an exciton which is created and annihilated periodically in time at an extremely high frequency. Electron and hole of an exciton are spatially separated from each other to form a dipole by applying a static electric field across the …
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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 3, 1996 and granted June 27, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 3, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 3, 2018.
- 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.