Light socket adapted smoke detector
CA 2274998 A1 · Owner: Nicholson, Leroy E. · Inventors: Nicholson, Leroy E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A smoke detector is provided with a threaded member which is adapted to be inserted into a conventional light bulb socket whereby the smoke detector is energized by standard AC power. A battery is incorporated on the smoke detector to provide standby power in the event of AC power failure. A battery charger is also incorporated on the smoke detector and is electrically connected to the AC power source and the battery for providing constant charging for the battery during normal operation.
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 June 15, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 15, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 15, 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.