Tunable photonic crystal
CA 2573149 C · Owner: Puscasu, Irina · Inventors: Johnson, Edward A.; Puscasu, Irina; Daly, James T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An infrared emitter (10), which utilizes a photonic crystal (PC) structure to produce electromagnetic emissions with a narrow band of wavelengths includes , a semiconductor material layer (12) a dielectric material layer (14) , overlaying the semiconductor material layer and a metallic material layer , (16) having an inner side overlaying the dielectric material layer. The semiconductor material layer (12) is capable of being coupled to an energy source for introducing energy to the semiconductor material layer. An array of surface features (18) are defined in the device in a periodic or quasiperiodic manner. The emitter device is adapted to emit electromagnetic energy having spectral …
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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 July 8, 2005 and granted June 6, 2017. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 8, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.