Patents by Inventor Herwig Buchholz

Herwig Buchholz 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).

  • FORMULATIONS HAVING AN ANTIVIRAL ACTION
    Publication number: 20020151599
    Abstract: The present invention relates to formulations in solid or liquid form comprising isoquercitrin as a natural flavonoid, which is present therein as a light protection filter and/or antiviral substance. The invention relates to both cosmetic and medicinal formulations.
    Type: Application
    Filed: July 8, 1999
    Publication date: October 17, 2002
    Inventors: HERWIG BUCHHOLZ, ANNETTE WAGNER, CHRISTINE KRAUS, JERZEY D. MEDUSKI
  • Method for catalytically disubstituting carboxylic acid amides with at least one grignard reagent
    Patent number: 6448445
    Abstract: The invention relates to a method for disubstituting carboxylic acid amides on the geminal carbonyl-C-atom using at least one grignard reagent in the presence of a metal alcoholate compound used as a catalyst and in the presence of another organometallic compound used as a co-catalyst.
    Type: Grant
    Filed: February 23, 2001
    Date of Patent: September 10, 2002
    Assignee: Merck Patent Gesellschaft mit beschraenkter Haftung
    Inventors: Herwig Buchholz, Urs Welz-biermann, Armin Meijere
  • USE OF TRIS (TRIFLUORO METHYLSULFONYL) METHANE, IN ADDITION TO ALKALINE METAL SALTS AND ALKALINE-EARTH METAL SALTS THEREOF AS CATALYSTS DURING C-C BONDING SYNTHESES AND THE NOVEL MG SALT OF TRIS (TRIFLUORO METHYLSULFONYL) METHANE
    Patent number: 6433227
    Abstract: Compounds are used as catalysts according to general formula (1) M+x(C(SO2CF3)3)x, whereby x is equal to 1 or 2; M represents one hydrogen or alkaline metal atom when x equals 1; and M represents one alkaline-earth metal atom when x equals 2. The invention also relates to a novel Mg compound of formula (1).
    Type: Grant
    Filed: April 6, 2000
    Date of Patent: August 13, 2002
    Assignee: Merck Patent Gesellschaft mit beschraenkter Haftung
    Inventors: Herwig Buchholz, Klaus-Dieter Franz, Herbert Mayr, Marcus-Alexander Funke, Andrea Zehetner
  • Galenical formulation
    Publication number: 20020106338
    Abstract: The invention relates to compounds of the formula I 1
    Type: Application
    Filed: November 14, 2001
    Publication date: August 8, 2002
    Inventors: Frank Pfluecker, Joachim Buenger, Hans-Juergen Driller, Herwig Buchholz, Ralf Rosskopf
  • Catalyst system
    Patent number: 6420302
    Abstract: The present invention generally relates to a catalyst system. The catalyst system can include a metal dioxide of titanium dioxide or hafnium dioxide, as well as a cocatalys of the general formula (IV) or (V): M′(s+)(O-isopropyl)s  (IV) R3SiX  (V) where: M′ is Al, Ca, Na, K, Si or Mg, s is an integer from 1 to 4 and is the oxidation state of the metal, R is alkyl having 1 to 10 C atoms or aryl having 6 to 20 C atoms, and X is F, Cl, Br, CN; or the general formulae (CH3)2Clsi(CH2)2SiCl(CH3)2 (CH3)2ClSi(CH2)3CN [(CH3)3Si]2O [(CH3)3Si]2NH or [(CH3)3Si]2.
    Type: Grant
    Filed: April 20, 2001
    Date of Patent: July 16, 2002
    Assignee: Merck Patent GmbH
    Inventors: Herwig Buchholz, Urs Welz-Biermann
  • Method for enzymatic splitting of rutinosides
    Patent number: 6420142
    Abstract: Disclosed is a method for enzymatic splitting of rutinosides, whereby rhamnose and/or corresponding glucopyranosides is/are obtained The inventive method is carried out in the presence of a solvent mixture made up of water and one or several organic solvents.
    Type: Grant
    Filed: April 25, 2001
    Date of Patent: July 16, 2002
    Assignee: Merck Patent Gesellschaft
    Inventors: Herwig Buchholz, Thomas Koppe, Michael Schleehahn