A life safety alarm with a sealed battery power supply
CA 2536375 C · Owner: Walter Kidde Portable Equipment, Inc. · Inventors: Sharpe, Jason M.; Deluca, Joseph G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A life safety alarm, for example a smoke alarm that is battery powered, has , an extended life and is less prone to user mistakes. The batteries are sealed inside the alarm portion so that the batteries cannot be accessed by the user. As a result, the batteries are not replaceable. Rather the alarm portion is , replaced at the end of the alarm life for example after expiration of a , predetermined time period such as ten years. The alarm is designed to be automatically activated upon initial attachment of the alarm portion to the bracket. The alarm can be manually deactivated but once deactivated, the , alarm cannot be reactivated and the alarm portion cannot be reattached to the …
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 August 20, 2004 and granted July 2, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 20, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 20, 2026.
- 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.