Process for recovery of oil from waste oil sludges
CA 2096247 A1 · Owner: Reynolds, Victor R. · Inventors: Reynolds, Victor R.; Heuer, Steven R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Commercially valuable oil is recovered from refinery-produced Resource Conservation and Recovery Act classified hazardous waste , oil sludges by a series of volatilizing and condensing steps (which may vary depending on the oil, water and solids content of, the sludge) resulting in the production of nonhazardous water and solid waste by products. A pumpable, low viscosity high oil, and/or water-content sludge is first centrifuged in a centrifuge (14) to separate free oil and water. If the waste sludges are acidic or if nickel is present in the sludges in sufficient quantities so as to result in unacceptable levels in the TCLP leach filtrate a base via line (17) (such as calcium oxide) 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 August 9, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 9, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 9, 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.