Treatment of spent bleaching clay
CA 1102297 A · Owner: Cpc International Inc. · Inventors: Puri, Pushpinder S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to the treatment of spent bleaching clay which has been utilized in and is a byproduct of the refining of animal and vegetable oils. The potentially hazardous clay is suspended in an alkaline aqueous solution of soap to saponify adsorbed oil. The clay is thereby deoiled and, if desired, the remaining solution may be acidified for separation of fatty acid derived from the oil. -1-
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 2, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 2, 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.