Compact hybrid particulate collector (cohpac)
CA 2079786 C · Owner: Electric Power Research Institute · Inventors: Chang, Ramsay
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for efficient removal of particulates from a gas is described which incorporates a barrier filter (44) (e.g. baghouse) internally of an electrostatic precipitator (34). An alternative embodiment is disclosed which incorporates an electrostatic precipitator (34) and a barrier filter (44) (i.e. baghouse) in series with, a pre-charger (40) interposed therebetween. The series arrangement enables the barrier filter (44) to operate at significantly higher filtration velocities than normal 4.06-20.32 cm/s (8-40 ft/min) versus 0.76-2.54 cm/s (1.5-5 ft/min) and reduces the size of the barrier filter (44) significantly. The pre-charger (40) adds an additional electrostatic …
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 10, 1992 and granted June 9, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 10, 2014.
- 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.