Time switch
CA 2292680 A1 · Owner: Asahi National Lighting Co. Ltd. · Inventors: Matsuda, Masanori; Muroi, Hiroaki; Yanagida, Kazuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A time switch includes a circuit board equipped with a time switch circuit operated by a commercial power source a battery, board to which a back-up battery for supplying a back-up power to the circuit board in case of an interruption of a power supply from the commercial power source is mounted and a casing in which the, circuit board and the battery board are mounted. The battery board is a member separated from the circuit board or integrally formed, with the circuit board by way of an easy-to-break portion having a relatively weak mechanical strength. Thus the battery board can, be detached from the circuit board so that the back-up battery is disposed apart from the circuit board.
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 17, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 17, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 17, 2021.
- 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.