Patents by Inventor Christina Lachmann

Christina Lachmann 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).

  • Cemented carbide article and method for making same
    Patent number: 9297054
    Abstract: The present invention relates to a cemented carbide article comprising a core of metal carbide grains and a binder selected from cobalt, nickel, iron and alloys containing one or more of these metals and a surface layer defining an outer surface for the article, the surface layer comprising 5 to 25 weight percent of tungsten and 0.1 to 5 weight percent carbon, the balance of the surface layer comprising a metal or alloy selected from the binder metals and alloys and the surface layer being substantially free of carbide grains as determined by optical microscopy or SEM. A method for the production of a cemented carbide article is also provided.
    Type: Grant
    Filed: January 17, 2012
    Date of Patent: March 29, 2016
    Assignee: Element Six GmbH
    Inventors: Igor Yurievich Konyashin, Bernd Heinrich Ries, Christina Lachmann
  • CEMENTED CARBIDE ARTICLE AND METHOD FOR MAKING SAME
    Publication number: 20150050512
    Abstract: The present invention relates to a cemented carbide article comprising a core of metal carbide grains and a binder selected from cobalt, nickel, iron and alloys containing one or more of these metals and a surface layer defining an outer surface for the article, the surface layer comprising 5 to 25 weight percent of tungsten and 0.1 to 5 weight percent carbon, the balance of the surface layer comprising a metal or alloy selected from the binder metals and alloys and the surface layer being substantially free of carbide grains as determined by optical microscopy or SEM. A method for the production of a cemented carbide article is also provided.
    Type: Application
    Filed: January 17, 2012
    Publication date: February 19, 2015
    Applicant: Element Six GMBH
    Inventor: Christina Lachmann