Determining the efficiency of respirators and protective clothing, and other improvements
CA 2394890 A1 · Owner: The Secretary Of State For Defence · Inventors: Richardson, Grant Stuart
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A respirator system (10; 100) for a worker in an environment with hazardous airborne contaminants comprises a respirator (12 112), a helmet (14, 114), a , camera (40 140), and a gas sample analyser (16, 116) capable of analysing samples of gas from within the respirator and in the immediate area near the user. An RF emitter (20, 120) sends a signal to a remote receiver (24 124). , The emitted signal is a real time view through the camera (40 140) and , overlaid on that is a graphical representation of the protection factor being achieved by the respirator. The system (100) may also have a data storage device (162, 170) to store data such as how protection factor varies with time and …
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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 12, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 12, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 12, 2022.
- 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.