Patents Assigned to WMF Aktiengesellschaft
  • Dining and/or serving cutlery made of ferritic stainless steel with a martensitic boundary layer
    Patent number: 8349094
    Abstract: The invention relates to dining and/or serving cutlery made of a steel material which is formed from a ferritic core with an essentially martensitic boundary layer. In the dining and/or serving cutlery of the invention, the surface hardness of the boundary layer, determined according to the hardness test according to Vickers HV 3, is thereby greater by 30 to 300% than the lowest hardness of the core, likewise measured according to Vickers HV 3.
    Type: Grant
    Filed: January 29, 2008
    Date of Patent: January 8, 2013
    Assignee: WMF Aktiengesellschaft
    Inventors: Cornelius Boerner, Guenter Buehlmaier, Wolfgang Friz, Alexander Kiefer, Martin Neumayer, Theda Staudinger