Operating device for lamps with a regulated sepic converter
CA 2419441 A1 · Owner: Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh · Inventors: Weirich, Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Operating device for lamps with a regulated SEPIC converter, The invention relates to a novel operating device for lamps, in particular low-pressure gas discharge lamps in which a SEPIC converter is used for charging a storage transistor from an AC voltage supply. In this case, the SEPIC converter is regulated to an output quantity as regulated variable, its operating frequency being altered. Preferably, only the switch-on time and not the switch-off time of the switching transistor of the SEPIC converter is altered in this case.
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 February 19, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 19, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 19, 2025.
- 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.