Kevin Ellis Hunter

US Patent:

D457107, May 14, 2002

Filed:

Jul 23, 2001

Appl. No.:

29/145430

Inventors:

Craig Kember - Irvine CA
Kevin K. Hunter - Laguna Niguel CA

Assignee:

Toyota Jidosha Kabushiki Kaisha

International Classification:

1208

US Classification:

D12 91

US Patent:

D460396, Jul 16, 2002

Filed:

Jul 9, 2001

Appl. No.:

29/144690

Inventors:

Craig Kember - Irvine CA
Kevin K. Hunter - Laguna Niguel CA

Assignee:

Toyota Jidosha Kabushiki Kaisha

International Classification:

1216

US Classification:

D12209

US Patent:

20130022722, Jan 24, 2013

Filed:

Jul 18, 2011

Appl. No.:

13/184871

Inventors:

Joby Ulahanan - Rochester Hills MI, US
Kevin Hunter - Ortonville MI, US

International Classification:

A23D 9/00

US Classification:

426417

Abstract:

A method of treating used cooking oil provides for exposing agitated oil for up to five minutes to a mixture of sodium silicate and silica xerogel in powder form, and filtering resulting oil powder mixture to remove the powder. The ratio of sodium silicate to silica xerogel is 30-70% to 70-30%, preferably 50-50%. The sodium silicate comprises 26-28% of NaO, 53-55% of SiO, and 15-20% of HO, with bulk density of about 29-37 lbs/ft, whereas the silica xerogel comprises: 96-99% of SiO, and 1-4% of NaSO, with bulk density of about 24-27 lbs/ft, the particle size being between 35 and 50 microns. Alternative embodiments provide the exposure of the oil first to one component of the mixture and then to another or the exposure to a single treating agent comprising 8-19% of NaO, 66-83% of SiO, 8-14% of HO, and 0.1-2% of NaSO.