Tamper indicator for a smoke detector
CA 2367809 C · Owner: Chambers, Bill · Inventors: Chambers, Bill
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is a tamper indicating kit for use with a smoke detector having a base plate for mounting to a mounting surface such as a ceiling or wall and said smoke detector also including an openable cover connected to said base plate; the tamper indicating kit includes: a thing planar adapter flange including a horizontal top section adapted to be sandwiched between a base plate and a mounting surface a side section extending vertically downwardly from a distal end of said top section; a horizontal relief section extending horizontally inwardly from a distal end of said side section and a flexible leg extending angularly downwardly from a distal end of said horizontal relief …
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 16, 2002 and granted March 20, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 16, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 16, 2024.
- 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.