Discharge lamp having two-band phosphor
CA 2470301 C · Owner: Mueller, Ulrich · Inventors: Jermann, Frank; Zachau, Martin; Huber, Guenter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A discharge lamp (1) having a discharge vessel (2) that surrounds a discharge medium that emits electromagnetic radiation in the VUV region during operation of the lamp has on the inner side of the discharge vessel wall a yellow phosphor layer facing the discharge medium and a blue phosphor layer lying therebelow. By contrast with a conventional three-band phosphor mixture a higher luminous flux and a smaller color locus displacement are thereby achieved. (Figure 1a)
Read the whole patent
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 June 8, 2004 and granted March 26, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 8, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 8, 2026.
- 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.