Protective enclosures having self-contained air supply
CA 1181901 A · Owner: Wong Technologies, Incorporated · Inventors: Wong, Albert H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In general terms, a lightweight flexible protective, enclosure (1 or 32) is disclosed to protect a wearer from suffocation due to the presence of smoke or similar noxious fumes that are present in a contaminated environment. In one case, the enclosure (1) has an opened bottom so that the wearer's head and upper body can be received therein. Fastening means (14) are included by which to secure the enclosure (1) around the waist of the wearer and thereby prevent the contaminated environment from entering the enclosure. In a second case the enclosure (32) has an opened side, (40) so that the wearer's head can be received therein. Fastening means (48) are included by which to secure the opened …
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
- Granted February 5, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 5, 2002.
- 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.