Peak voltage reducer circuit for fluorescent lamps
CA 2006532 A1 · Owner: North American Philips Corporation · Inventors: Crawford, Joseph A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Peak voltage reducer circuit for fluorescent lamps. A rapid start system for the operations of fluorescent lamps which has its starting capacitance connected to a tap on the secondary of the ballast transformer which tap is located at a predetermined number of turns of the secondary.
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 22, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 22, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 22, 2011.
- 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.