Universal switching power supply
CA 2228357 A1 · Owner: Siemens Milltronics Process Instruments Inc. · Inventors: Mercier, Claude
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A switching power supply for generating one or more output voltage levels wherein the power supply is operable over a range of AC and DC input supply voltages. The switching power supply comprises an input stage a, start-up stage, a first stage, and a second stage. The first stage energizes the second stage and the second, stage includes output circuits for generating one or more output voltage levels. The second stage also includes a transformer for isolating the first stage.
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 January 30, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 30, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 30, 2020.
- 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.