Electroluminescent device and oxide phosphor for use therein
CA 2356045 A1 · Owner: Ueno, Toshiaki · Inventors: Ueno, Toshiaki; Miyata, Toshihiro; Urano, Yuji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides an oxide phosphor for use in an electroluminescent device, which phosphor is capable of providing a high-luminance EL device while the composition thereof is controlled to be as simple as possible and which phosphor attains multi-color and full-color light emissions without the need for treatment at a high temperature greatly in excess of 1,000ÀC. The invention also provides an electroluminescent device employing the phosphor. The oxide phosphor for use in an electroluminescent device is formed from an yttrium (Y) oxide as a matrix and at least one transition metal element as an activator or from a Y-Ge-O, oxide or a Y-Ge-Si-O oxide as a matrix and at least …
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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 August 28, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 28, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 28, 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
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.