Patents by Inventor Sigbert Schiefer

Sigbert Schiefer 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 and reagent for the determination of low density lipoproteins (LDL)
    Patent number: 5532172
    Abstract: The present invention provides a process for the determination of low density lipoproteins (LDL) in body fluids, wherein high density lipoprotein (HDL) antibodies are added to a sample to be investigated, insolubles formed are separated off and the LDL or one of its components is determined in the supernatant. The present invention also provides a reagent for the determination of the LDL fraction in body fluids, wherein it contains HDL antibodies.
    Type: Grant
    Filed: December 28, 1994
    Date of Patent: July 2, 1996
    Assignee: Boehringer Mannheim GmbH
    Inventors: Joachim Ziegenhorn, Sigbert Schiefer, Brigitte Drager
  • Process and reagent for the determination of low density lipoproteins (LDL)
    Patent number: 5407836
    Abstract: The present invention provides a process for the determination of low density lipoproteins (LDL) in body fluids, wherein high density lipoprotein (HDL) antibodies are added to a sample to be investigated, insolubles formed are separated off and the LDL or one of its components is determined in the supernatant.The present invention also provides a reagent for the determination of the LDL fraction in body fluids, wherein it contains HDL antibodies.
    Type: Grant
    Filed: June 30, 1993
    Date of Patent: April 18, 1995
    Assignee: Boehringer Mannheim GmbH
    Inventors: Joachim Ziegenhorn, Sigbert Schiefer, Brigitte Drager
  • Process and a reagent for the determination of low density lipoproteins (LDL)
    Patent number: 4746605
    Abstract: A method for determining low density lipoproteins (LDLs) in a body fluid sample, as well as a reagent suited for this use, are taught. The method involves precipitating high density lipoproteins (HDLs) from the sample, using an HDL specific antibody or reactive fragment, and then determining the presence and amount of LDL in the supernatant which results. The reagent contains the HDL specific antibodies, as well as polyanions and divalent cations.
    Type: Grant
    Filed: October 2, 1984
    Date of Patent: May 24, 1988
    Assignee: Boehringer Mannheim GmbH
    Inventors: Lorenz Kerscher, Joachim Ziegenhorn, Sigbert Schiefer