Patents by Inventor Cheng Keat Ooi

Cheng Keat Ooi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6072092
    Abstract: A process for the recovery of carotenes and the production of carotene concentrate from natural oils and fats. The carotene-containing natural oils and fats is subjected to alcoholic esterification to form a mixture of fatty acid alkyl esters, carotenes, tocopherols and tocotrienols. The alkyl esters mixture is subjected to vacuum distillation at a pressure of less than 60 mTorr and a temperature of less than 180.degree. C. to form a carotene-rich concentrate. The carotenes in the carotene-rich concentrate are adsorptively separated, concentrated and collected as carotene-rich fraction.
    Type: Grant
    Filed: April 30, 1996
    Date of Patent: June 6, 2000
    Assignee: Palm Oil Research & Development Board
    Inventors: Cheng Keat Ooi, Yuen May Choo, Ah Ngan Ma, Soon Chee Yap