Thallium-free metal halide fill for discharge lamps and discharge lamp containing same
CA 2489264 C · Owner: Osram Sylvania Inc. · Inventors: Brock, Lori R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A thallium-free metal halide fill for ceramic metal halide lamps is provided wherein the fill comprises mercury sodium iodide, an alkaline earth iodide selected from calcium iodide strontium iodide, barium iodide, or combinations thereof and a rare-earth iodide selected from cerium iodide dysprosium iodide, holmium iodide, thulium iodide or combinations thereof. In a preferred embodiment the fill allows dimming of discharge lamps containing same to about 60% of rated power without substantially affecting the color of the emitted light.
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 December 6, 2004 and granted April 2, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 6, 2024.
- 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.