Illumination device and control method
CA 2521588 C · Owner: Ploetz, Ludwig · Inventors: Ploetz, Ludwig; Philipp, Andre; Biebl, Alois
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A description is given of an illumination device which emits mixed-color light containing light of at least two different color channels (R R1, G, G1, B, B1). The illumination device contains at least one primary light source (1) of a first color the light of which forms a first color channel (R R1, G, G1, B, B1), and at least one primary light source (1) of a second color the light of which forms a second color channel (R R1, G, G1, B, B1), at least one sensor device (3) which is positioned such that it can receive mixed-color light and is suitable for detecting brightness of light of a wavelength range comprising the color channels (R R1, G, G1, B, B1) and which determines 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 29, 2005 and granted December 3, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 29, 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.