Process of flue gas conditioning applied to fabric filtration
CA 2020208 C · Owner: University Of North Dakota School Of Engineering & Mines Foundation (Und-Sem Foundation) · Inventors: Laudal, Dennis L.; Miller, Stanley J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of improving control of atmospheric emission of particulate matter from the emission stack of coal combustion facilities which employ baghouse particle controllers is disclosed. The method involves injecting upstream of the baghouse a small but conditioning effective amount of ammonia gas and sulfur trioxide in sequence. When this is done the pres-, sure drop across the baghouse is less and the amount of particulate matter in the smoke stack emissions is reduced by significant amounts.
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 June 29, 1990 and granted July 23, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 29, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 29, 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.