Method for feeding a plurality of discharge or fluorescent lamps connected in series, and apparatus that carries out such method
CA 2133564 A1 · Owner: Basile, Gianluigi · Inventors: Basile, Gianluigi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A plurality of electric discharge lamps or, fluorescent lamps, connected in series are fed at the, startup with a variable voltage having a frequency that is varied, during a preset time period between, preset extreme values, respectively a minimum value and a maximum value, so as to cause the startup of the lamps with a convenient voltage value. Subsequently the lamps are fed with constant current having nominal frequency.
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 January 31, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 31, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 31, 2016.
- 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.