Pulsed regeneration of adsorption column
CA 1188230 A · Owner: Westvaco Corporation · Inventors: Hager, Donald G.; Rubel, Frederick, Jr.; Massey, Michael L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An activated carbon adsorption column for the treatment of waste water is continuously sterilized and/or regenerated in pulsed batches of carbon amounting to 5 to 25 percent of the working column quantity transferred alternately, from the influent face of the column to one of two, off-stream blow case vessels for steam processing and returned to the effluent face of the working column upon the next programmed pulsing interim.
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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
- Granted June 4, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 4, 2002.
- 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.