Backflash interrupter
CA 2045168 C · Owner: Degood, Robert L. · Inventors: Chatrathi, Srikrishna; Degood, Robert L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A backflash interrupter device is provided which can be placed in-line in a run of pipe, duct, or the like for preventing a pressure wave and any subsequentflame front traveling along the run from passing beyond the device. The preferred backflash interrupter device includes a chamber base (18) and a vent cap (20) cooperatively defining a transfer chamber (22) with at least two fluid-conducting members (24, 26) coupled therewith with the distal ends (50 58) thereof, configured for coupling with respective terminal ends of portions of the run of pipe duct, or the like.
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 31, 1990 and granted September 3, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 31, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 31, 2012.
- 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.