Process for the manufacture of lubricating oil
CA 1104084 A · Owner: Shell Canada Limited · Inventors: De Gruijter, Wouter C.; Kwant, Pieter B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Lubricating oil having a viscosity index above 140 is prepared from slack wax having a nitrogen content below 500 ppmw by hydrocracking over a fluorine-containing catalyst comprising either nickel and/or cobalt and, in addition, molybdenum or nickel and, tungsten on alumina as the carrier which catalyst has been prepared, from an alumina hydrogel and which catalyst has taken up at least 0.1 %w nitrogen, by previous contact with basic nitrogen compounds present in atmospheric distillation residues of waxy crude oils.
Read the whole patent
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 30, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 30, 1998.
- 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.