Method and device for purifying air
CA 2086927 A1 · Owner: Abb Flakt Ab · Inventors: Larsson, Ola
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and a device designed to clean air and water as well as to recover purified process water with reference to a drier (1) in a particle board or fiber board production process. The polluted air from the drier is fed through a scrubber (3) and is freed in the scrubber from the main part of solid and gaseous contaminants, before it is discharged into the atmosphere whereas the, process water is fed through a coarse separator before it is, returned to the scrubber. According to the invention a portion of the process water from the washing cycle is withdrawn and is fed through a biological purification plant (20) designed to decompose the, organic contaminants which are dissolved in the …
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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 27, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 27, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 27, 2013.
- 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.