High cri metal halide lamp with constant color throughout life
CA 2292091 A1 · Owner: Nortrup, Edward H. · Inventors: Nortrup, Edward H.; Hrubowchak, David M.; Scholz, John A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A metal halide lamp with high color rendering index greater then 80, with , substantially, constant color temperature through life. The lamp arc discharge vessel has a small, volume, i.e. less than 1 cc, and contains iodides of sodium scandium, lithium, dysprosium, and thallium along with mercury a buffer gas and scandium metal. , The addition of the scandium metal does not raise the arc discharge vessel temperature and, significantly reduces the color temperature decline during life.
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 10, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 10, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 10, 2021.
- 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.