Clay contacting process for removing contaminants from waste lubricating oil
CA 1136566 A · Owner: Johnson, Conrad B. · Inventors: Johnson, Conrad B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
CLAY CONTACTING PROCESS FOR REMOVING, CONTAMINANTS FROM WASTE LUBRICATING OIL" ABSTRACT OF THE DISCLOSURE, A process is provided for removing contaminants from waste lubricating oil. The previously untreated waste oil is contacted with decolorizing clay at a temperature in the range of about 650 - 725°F and the clay-oil mixture filtered to produce a filtrate product reduced in contaminants. The clay contacting step may optionally be performed in a hydrogen atmosphere. The filtered product can be used for non-critical uses or further upgraded by conventional methods.
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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 November 30, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 30, 1999.
- 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.