Patents by Inventor Robert J. Kwok

Robert J. Kwok 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).

  • Process of manufacturing crystal sugar from an aqueous sugar juice such as cane juice or sugar beet juice
    Patent number: 5902409
    Abstract: This invention relates to a process for the manufacture of crystal sugar from an aqueous sugar juice containing sugars and organic and mineral impurities, including Ca.sup.2+ and/or Mg.sup.2+ ions, such as a sugar cane or sugar beet juice, comprising the following operations:(a) concentration of said sugar juice to give a syrup, and(b) crystallization of said syrup to give a crystal sugar and a molasses,characterized in that it also comprises an operation:(c) of tangential microfiltration, tangential ultrafiltration or tangential nanofiltration, this operation being effected before operation (a).It also relates to a process for the production of crystal white sugar from a sugar juice of the sugar cane juice type, comprising the above-mentioned process for the production of crystal sugar, completed by re-melt, decolorization and crystallization operations.
    Type: Grant
    Filed: August 15, 1996
    Date of Patent: May 11, 1999
    Assignee: Societe Nouvelle de Recherches et d'Applications Industrielles d-Exchangeurs d'Ions Applexion
    Inventors: Robert J. Kwok, Xavier Lancrenon, Marc-Andre Theoleyre
  • Process of manufacturing crystal sugar from an aqueous sugar juice such as cane juice or sugar beet juice
    Patent number: 5554227
    Abstract: This invention relates to a process for the manufacture of crystal sugar from an aqueous sugar juice containing sugars and organic and mineral impurities, including Ca.sup.2+ and/or Mg.sup.2+ ions, such as a sugar cane or sugar beet juice, comprising the following operations:(a) concentration of said sugar juice to give a syrup, and(b) crystallization of said syrup to give a crystal sugar and a molasses,characterized in that it also comprises an operation:(c) of tangential microfiltration, tangential ultrafiltration or tangential nanofiltration, this operation being effected before operation (a).It also relates to a process for the production of crystal white sugar from a sugar juice of the sugar cane juice type, comprising the above-mentioned process for the production of crystal sugar, completed by re-melt, decolorization and crystallization operations.
    Type: Grant
    Filed: November 12, 1993
    Date of Patent: September 10, 1996
    Assignee: Societe Nouvelle de Recherches et d'Applications Industrielles d'Echangeurs d'Ions Applexion
    Inventors: Robert J. Kwok, Xavier Lancrenon, Marc-Andre Theoleyre