Electronic device for sensing gases and emitting a voice safety message
CA 2288419 A1 · Owner: Maier, Helmut Wolfgang · Inventors: Maier, Steven Edward; Maier, Helmut Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention hereafter referred to as "Device Sensor, Unit or, Apparatus", used interchangeably or otherwise relates to a device used to, test and detect the presence of a large range of gases such as but not, limited to Carbon Monoxide (CO) Propane(C3H8) and Methane (CH4). The device is designed to engage a Voice or Sound Alarm when a detection of an amount of gas or gases have reached harmful or undesired levels. An Alarm consists of words and sounds featured either seperately, or combined pre-recorded or recordable by the user. The device has an end plug into which is built a battery a loudspeaker, a circuit board, a gas, sensor and a switch when passive and an extra switch when …
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 October 28, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 28, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 28, 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.