Chemical waste treatment
CA 2177151 A1 · Owner: Russo, Gaetano · Inventors: Russo, Gaetano
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for the treatment of chemical wastes particularly recalcitrant wastes such as spent caustic from the oil gas chemical and, petrochemical industries in which normally slow physical mass transfer of gases between phases and other chemical reactions, such as, carbonation stripping and oxidation, are facilitated and speeded up. The result is more environmentally acceptable waste for disposal. It involves the mixing together in a reaction vessel (8) of the first waste fluid with a second fluid by using a mixing device such as a jet, compressor (5), designed to intimely mix the fluids together so as to provide a large surface area of the second fluid relative to the first. The process is …
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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 November 25, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 25, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 25, 2016.
- 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.