Ballasting network with integral trap
CA 2114990 A1 · Owner: Electronic Lighting Industries, Inc. · Inventors: Lesea, Ronald A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Briefly, to reduce switching stresses employed, is a high-frequency AC power source (110) and a current-limiting (ballasting) network (116). The network (116) includes a high-frequency trap (120) and an impedance transforming network (122) which is, coupled to the AC power source (110) by the trap (120) and which is for connection to a load that includes at least one gaseous discharge (fluorescent) lamp or other non-linear or negative-resistance load (102). The trap which has the parallel resonant combination of an inductor (130) and a capacitor (132) is, resonant at a frequency chosen such that the switching-circuit transistors(s) (210, or 230 and 232 or 250 and 252, or 270 and 272, or …
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 4, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 4, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 4, 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.