Lighting system
CA 2425333 A1 · Owner: Niedermeier, Peter · Inventors: Huber, Andreas; Limmer, Walter; Kastle, Herbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Lighting system for high-pressure discharge lamps which can generate a lamp voltage UL which is amplitude and if necessary, frequency-modulated. The frequency modulation is provided by an inverter whose inverter frequency is modulated. The inverter is fed by a clocked d.c. voltage supply which emits an operating voltage U0 which is amplitude-modulated.
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 April 14, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 14, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 14, 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.