Metal-halide discharge lamp for photo-optical purposes
CA 2201591 C · Owner: Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh · Inventors: Dirks, Joachim
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A metal halide discharge lamp for photo-optical purposes contains an ionisable filling consisting of mercury, at least one rare gas at least one halogen, aluminium (Al) and Indium (In) and also gallium (Ga). The Ga additive typically in the range between 0.02 and 1 mg/cm3 reduces the striking voltage , while maintaing an Ra > 85 at colour temperatures typically between 5000 and 11000 K.
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 October 10, 1995 and granted March 5, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 10, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 10, 2017.
- 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.