Patents by Inventor Wolfgang Kraas

Wolfgang Kraas 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).

  • Laser marking of documents of value
    Publication number: 20060141391
    Abstract: Disclosed are laser markings on a document of value and methods of preparing the same which are based on the interaction of the laser radiation with the printing-ink employed.
    Type: Application
    Filed: November 30, 2005
    Publication date: June 29, 2006
    Inventors: Sylke Klein, Michael Weiden, Wolfgang Kraas, Klaus-Christian Ullmann, Burkhard Krietsch
  • Method for serological typing using type-specific antigens
    Publication number: 20030108974
    Abstract: The invention concerns a method for typing antibodies in a sample liquid by means of type-specific antigens and in particular a method for typing antibodies to the hepatitis C virus and peptide antigens suitable for this.
    Type: Application
    Filed: July 17, 2002
    Publication date: June 12, 2003
    Applicant: Roche Diagnostics GmbH
    Inventors: Cristoph Seidel, Ursula-Henrike Wienhues-Thelen, Urban Schmitt, Gunther-Gerhard Jung, Hans-Georg Ihlenfeldt, Wolfgang Kraas
  • Method for serological typing using type-specific antigens
    Patent number: 6447992
    Abstract: The invention concerns a method for typing antibodies in a sample liquid by means of type-specific antigens and in particular a method for typing antibodies to the hepatitis C virus and peptide antigens suitable for this.
    Type: Grant
    Filed: July 12, 1999
    Date of Patent: September 10, 2002
    Assignee: Roche Diagnostics Gmbh
    Inventors: Cristoph Seidel, Ursula-Henrike Wienhues-Thelen, Urban Schmitt, Günther-Gerhard Jung, Hans-Georg Ihlenfeldt, Wolfgang Kraas
  • Method for serological typing using type-specific antigens
    Patent number: 5935778
    Abstract: The invention concerns a method for typing antibodies in a sample liquid by means of type-specific antigens and in particular a method for typing antibodies to the hepatitis C virus and peptide antigens suitable for this.
    Type: Grant
    Filed: April 28, 1997
    Date of Patent: August 10, 1999
    Assignee: Boehringer Mannheim GmbH
    Inventors: Cristoph Seidel, Ursula-Henrike Wienhues-Thelen, Urban Schmitt, Gunther-Gerhard Jung, Hans-Georg Ihlenfeldt, Wolfgang Kraas