Solid state electronic ballast
CA 2025988 A1 · Owner: Skalak, Peter Gregory · Inventors: Skalak, Peter Gregory; Teo, Willie Chin Kian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The electronic ballast for a fluorescent lamp replaces the three main components of a traditional fluorescent lamp ballast, namely th ferro-magnetic ballast the power factor, condenser, the starter and starter holder. The solid state electronic ballast of the invention comprises a power supply conversion circuit a start-up, circuit and a switching resonant circuit. The power supply conversion circuit consists of a common mode line filter connected with a rectifier bridge circuit and a low harmonic filter. Connected in series follows the start-up circuit with a sawtooth oscillator, a diac trigger and a first transistor. A second transistor forms together with an inductor, a transformer, and …
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 September 21, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 21, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 21, 2012.
- 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.