Patents by Inventor Harald Wilhelm Walter Roper

Harald Wilhelm Walter Roper 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 for the production of xylitol
    Patent number: 6458570
    Abstract: The present invention relates to a process for the production of xylitol. Specifically the process comprises two reaction steps. The first step is the fermentative conversion of a hexose to a pentitol. The second step is the catalytic chemical isomerisation of the pentitol to xylitol. Optionally, the xylitol is separated from the other pentitols.
    Type: Grant
    Filed: July 15, 1996
    Date of Patent: October 1, 2002
    Assignee: Cerestar Holding B.V.
    Inventors: Myriam Elseviers, Harald Wilhelm Walter Röper
  • Beverages for enhanced physical performance
    Patent number: 6296892
    Abstract: The present invention discloses an isotonic beverage product for direct increase of the muscular ATP level consisting essentially of a solution of D-ribose and blood glucose increasing monosaccharides and oligosaccharides and/or hydrogenated glucose syrups. These drinks serve to increase the overall performance during physical exercise and at the same time diminish fatigue.
    Type: Grant
    Filed: July 21, 1998
    Date of Patent: October 2, 2001
    Assignee: Cerestar Holding B.V.
    Inventors: Myriam Elseviers, Harald Wilhelm Walter Röper, Hubert Köbernick
  • Highly fermentable resistant starch
    Patent number: 6043229
    Abstract: The present invention discloses that retrograded starch having more than 55% resistant starch with >50% chains of DP 10-35 gives rise to a significantly higher amount of n-butyrate production under conditions simulating the human colon. It is expected that such an increased n-butyrate production will diminish the development of colon diseases notably of colon cancer.
    Type: Grant
    Filed: December 2, 1997
    Date of Patent: March 28, 2000
    Assignee: Cerestar Holding B.V.
    Inventors: Bernd Wolfgang Kettlitz, Jozef Victor Jean-Marie Coppin, Harald Wilhelm Walter Roper, Francis Bornet
  • Method for the production of isomalto-oligosaccharide rich syrups
    Patent number: 6025168
    Abstract: The present invention describes a method for the production of isomalto-oligosaccharides syrups. The method comprises the use of enzymes immobilized on a re-usable carrier. The carrier is preferably an anion exchanger. The enzymes used for the conversion of starch hydrolysates are transglucosidase and pullulanase preferably these enzymes are co-immobilized. The carrier/enzyme conjugate is further reinforced by cross-linking.
    Type: Grant
    Filed: May 1, 1998
    Date of Patent: February 15, 2000
    Assignee: Cerestar Holding B.V.
    Inventors: Ronny Leontina Marcel Vercauteren, Van Sau Nguyen, Harald Wilhelm Walter Roper
  • Process for the production of 2-keto-D-glusonic acid
    Patent number: 6018034
    Abstract: This process for the production of 2-keto-D-gluconic acid starts from D-glucose. D-glucose is catalytically oxidised using molecular oxygen in a one-pot process. The oxidation is performed in the presence of well-known Pt/Pb catalysts. The initial reaction to D-gluconic acid is performed at constant pH between 7 and 10. There after the reaction is continued without pH control. This process results in a high selectivity compared with known processes.
    Type: Grant
    Filed: March 25, 1998
    Date of Patent: January 25, 2000
    Assignee: Cerestar Holdings B.V.
    Inventors: Myriam Elseviers, Sonia Marianne Jeannine Coomans, Hilde Odile Jozefine Lemmens, Harald Wilhelm Walter Roper
  • Process for the production of arabinitol
    Patent number: 5831078
    Abstract: A method is disclosed for producing a pentitol. The disclosed method more particularly relates to producing arabinitol from hexoses, e.g. galactose and/or glucose, and/or fructose, or lactose hydrolysate, or invert sugar, or starch hydrolysates. The hexose is oxidatively decarboxylated to a C.sub.5 -aldonic acid which is thereafter catalytically hydrogenated to obtain the desired arabinitol.
    Type: Grant
    Filed: July 23, 1997
    Date of Patent: November 3, 1998
    Assignee: Cerestar Holding B.V.
    Inventors: Myriam Elseviers, Hilde Odile Jozefine Lemmens, Sonia Marianne Jeannine Coomans, Harald Wilhelm Walter Roper
  • Method for production of tetritols, specifically meso-erythritol
    Patent number: 5756865
    Abstract: The present invention discloses a chemical method for producing meso-erythritol. The method comprises catalytic hydrogenation of tartaric acid. The tetritol mixture resulting from the hydrogenation can be separated into its components. Alternatively selected components can be isomerized prior to such a separation.
    Type: Grant
    Filed: October 3, 1996
    Date of Patent: May 26, 1998
    Assignee: Cerestar Holding B.V.
    Inventors: Myriam Elseviers, Harald Wilhelm Walter Roper, Roland Herwig Friedrich Beck, Sonia Marianne Jeannine Coomans