Filter pulse-down cartridge cleaning mechanism
CA 2024356 A1 · Owner: Merritt, Christopher R. · Inventors: Merritt, Christopher R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A particulate material recovery system provides a flow of gas in which particulate material is entrained. The particulate material-laden gas is passed through a filter having an upstream side and a downstream side, with the particulate material remaining on the upstream side while the gas flows to the downstream side. The downstream side exhausts through an opening into a plenum chamber wherein the gas pressure is less than the gas pressure on the upstream side and wherein means are provided for intermittently providing a cleaning gas flow in the reverse direction through the filter to remove particulate material from the upstream side. A first valve controls gas flow through the opening. …
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 August 30, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 30, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 30, 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.