Patents by Inventor Andreas Lietzmann

Andreas Lietzmann 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: 6528474
    Abstract: The invention relates to a process for the production of substantially alumosilicate-free detergents containing a soluble builder system which provides free-flowing and storage-stable granules. In this process for the production of a particulate, substantially alumosilicate-free detergent, an anionic surfactant acid is sprayed onto a detergent component containing anionic surfactant and builders in order to increase the anionic surfactant content.
    Type: Grant
    Filed: July 5, 2000
    Date of Patent: March 4, 2003
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Rene-Andres Artiga Gonzalez, Andreas Lietzmann, Maria Liphard, Wilfried Roehl
  • Patent number: 6407045
    Abstract: The invention set out to improve the oxidizing and bleaching effect of inorganic peroxygen compounds in dishwashing, more particularly machine dishwashing, in terms of their storage stability. This was essentially achieved by using particulate compounds corresponding to formula R1R2R3N−CH2CN X+, in which R1, R2, and R3 independently of one another represent an alkyl, alkenyl or aryl group containing 1 to 18 carbon atoms, in addition to which the groups R2 and R3 may even be part of a heterocycle including the N atom and optionally other hetero atoms, and X is a charge-equalizing anion. Dishwashing detergents, more particularly machine dishwashing detergents, contain about 1% by weight to 10% by weight of this bleach-boosting agent.
    Type: Grant
    Filed: October 2, 2001
    Date of Patent: June 18, 2002
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Christian Nitsch, Horst-Dieter Speckmann, Juergen Haerer, Andreas Lietzmann, Susan P. Huestis
  • Publication number: 20020032139
    Abstract: The invention set out to improve the oxidizing and bleaching effect of inorganic peroxygen compounds in dishwashing, more particularly machine dishwashing, in terms of their storage stability. This was essentially achieved by using particulate compounds corresponding to formula R1R2R3N+CH2CNX−, in which R1, R2, and R3 independently of one another represent an alkyl, alkenyl or aryl group containing 1 to 18 carbon atoms, in addition to which the groups R2 and R3 may even be part of a heterocycle including the N atom and optionally other hetero atoms, and X is a charge-equalizing anion. Dishwashing detergents, more particularly machine dishwashing detergents, contain about 1% by weight to 10% by weight of this bleach-boosting agent.
    Type: Application
    Filed: October 2, 2001
    Publication date: March 14, 2002
    Inventors: Christian Nitsch, Horst-Dieter Speckmann, Juergen Haerer, Andreas Lietzmann, Susan P. Huestis
  • Patent number: 6221824
    Abstract: The storage stability of bleach-activating acetonitrile derivatives in solid detergent compositions was to be improved. This was essentially achieved by the use of compounded compounds corresponding to formula R1R2R3NxCH2CN X−, in which R1, R2 and R3 independently of one another represent an alkyl, alkenyl or aryl group containing 1 to 18 carbon atoms, in addition to which the groups R2 and R3 may even be part of a heterocycle including the N atom and optionally other hetero atoms, and X is a charge-equalizing anion. “Compounds” of this type are produced by drying in vacuo, for which purpose a suspension of the acetonitrile derivative and a solid carrier material is introduced into a mixer and the resulting mixture is dried with superheated vapor. Dishwashing detergents, more particularly machine dishwashing detergents, contain about 1% by weight to 10% by weight of this bleach boosting compound.
    Type: Grant
    Filed: February 25, 2000
    Date of Patent: April 24, 2001
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Andreas Lietzmann, Artiga Gonzalez, Stefan Hammelstein, Christian Nitsch, Horst-Dieter Speckmann
  • Patent number: 6221820
    Abstract: Free-flowing, storage-stable homogeneous granules for protecting silver in machine dishwashing are obtained through a granular free-flowing component comprising an organic solid (I) from the group of alkylaminotriazoles and a constituent (II) selected from the group of alkali metal sulfates, the ratio of solid (I) to solid (II) being from 1:100 to 2:1, preferably from 1:70 to 3:2 and more preferably from 1:50 to 2:3 and the component having a particle size of 0.01 to 2 millimeters, preferably 0.05 to 1.8 millimeters and more preferably 0.1 to 1.6 millimeters.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: April 24, 2001
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Andreas Lietzmann, Thomas Holderbaum, Peter Jeschke, Juergen Haerer