Patents by Inventor Helmut Greiving

Helmut Greiving 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).

  • Method for preparing and purifying 3-hydroxyamidinophenylalanine compounds
    Patent number: 7951943
    Abstract: The present invention relates to the preparation of 3-hydroxyamidino-phenylalanine derivatives in highly pure form which can be used for example as urokinase inhibitors. The present invention further relates to the use of high-purity 3-hydroxyamidinophenylalanine derivatives for preparing 3-amidinophenylalanine derivatives.
    Type: Grant
    Filed: October 14, 2005
    Date of Patent: May 31, 2011
    Assignee: Wilex AG
    Inventor: Helmut Greiving
  • Method for Cleaning 3-Hydroxyamidinophenylalanine Derivatives by the Precepitation and Recrystallization of Salt and an Aromatic Sulfonic Acid
    Publication number: 20090099360
    Abstract: The present invention relates to the preparation of 3-hydroxyamidino-phenylalanine derivatives in highly pure form which can be used for example as urokinase inhibitors. The present invention further relates to the use of high-purity 3-hydroxyamidinophenylalanine derivatives for preparing 3-amidinophenylalanine derivatives.
    Type: Application
    Filed: October 14, 2005
    Publication date: April 16, 2009
    Applicant: WILEX AG
    Inventor: Helmut Greiving
  • Method for Cleaning 3-Hydroxyamidinophenylalanine Derivatives by the Precepitation and Recrystallization of Salt and an Aromatic Sulfonic Acid
    Publication number: 20080039626
    Abstract: The present invention relates to the preparation of 3-hydroxyamidino-phenylalanine derivatives in highly pure form which can be used for example as urokinase inhibitors. The present invention further relates to the use of high-purity 3-hydroxyamidinophenylalanine derivatives for preparing 3-amidinophenylalanine derivatives.
    Type: Application
    Filed: October 14, 2005
    Publication date: February 14, 2008
    Applicant: WILEX AG
    Inventor: Helmut Greiving
  • Aqueous coating compositions based on epoxybutene polyethers
    Patent number: 6787627
    Abstract: The invention relates to water-dilutable polyurethanes containing structural units derived from 3,4-epoxy-1-butene and also to aqueous dispersions comprising these polyurethanes, to a process for preparing them and to use as aqueous oxidatively drying and/or UV-crosslinking coating compositions.
    Type: Grant
    Filed: February 18, 2003
    Date of Patent: September 7, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Martin Melchiors, Jan Weikard, Rolf Gertzmann, Helmut Greiving, Ulrich Freudenberg
  • Process for preparing a polymer from 3,4-epoxy-1-butene
    Patent number: 6696531
    Abstract: The invention relates to a process for preparing a polymer by polymerizing a component containing 3,4-epoxy-1-butene in the presence of a double metal cyanide (DMC) catalyst and a hydroxy-functional starter and it also relates to the obtained polymers.
    Type: Grant
    Filed: February 18, 2003
    Date of Patent: February 24, 2004
    Assignee: Bayer Polymers LLC
    Inventors: Helmut Greiving, Peter J. Miller
  • Aqueous coating compositions based on epoxybutene polyethers
    Publication number: 20030232955
    Abstract: The invention relates to water-dilutable polyurethanes containing structural units derived from 3,4-epoxy-1-butene and also to aqueous dispersions comprising these polyurethanes, to a process for preparing them and to use as aqueous oxidatively drying and/or UV-crosslinking coating compositions.
    Type: Application
    Filed: February 18, 2003
    Publication date: December 18, 2003
    Inventors: Martin Melchiors, Jan Weikard, Rolf Gertzmann, Helmut Greiving, Ulrich Freudenberg
  • Preparation of aliphatic &agr;, &ohgr;-dicarboxylic acids
    Patent number: 6437180
    Abstract: A process for preparing aliphatic C4-18 &agr;,&ohgr;-dicarboxylic acids by oxidation of C6-20 &agr;,&ohgr;-dienes with hydrogen peroxide or compounds which release hydrogen peroxide under the reaction conditions as is characterized in that the reaction is carried out in the presence of a transition metal catalyst of group VI and of a mixture containing at least one organic acid and one aprotic organic solvent. A specific temperature profile is maintained at different phases of the reaction, which increases yield and selectivity.
    Type: Grant
    Filed: May 11, 2000
    Date of Patent: August 20, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Michael Schelhaas, Helmut Greiving, Manfred Jautelat
  • Process for synthesizing khi-substituted ring systems
    Patent number: 6235925
    Abstract: Using the process according to the invention, it is possible to provide, with few reaction steps, a novel route to &agr;-substituted ring systems which optionally have further substituents.
    Type: Grant
    Filed: August 31, 1999
    Date of Patent: May 22, 2001
    Assignee: Bayer Aktiengesellschaft
    Inventors: Christoph Gürtler, Manfred Jautelat, Helmut Greiving, Herbert Hugl