Light-emitting diode having light reflecting layer
CA 2030368 C · Owner: Kato, Toshihiro · Inventors: Kato, Toshihiro; Saka, Takashi; Susawa, Hiromoto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A light-emitting diode having a light-generating layer for generating an electromagnetic radiation by electroluminescence, a light-emitting surface through which the radiation is emitted, and a light-reflecting layer remote from the light-emitting surface for reflecting a, portion of the radiation toward the light-generating layer so that the radiation reflected by the light-reflecting layer is also emitted through the light-emitting surface. The light-reflecting layer consists of two or more interference type reflecting layers which includes one or more reflecting layer each capable of most efficiently reflecting a wave whose wavelength is longer than the nominal wavelength of 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 November 20, 1990 and granted March 28, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 20, 2012.
- 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.