Patent · US Active

Dining and/or serving cutlery made of ferritic stainless steel with a martensitic boundary layer

US8349094B2 · kind B2 · utility

2Cited by

2References

16Claims

0Family size

Assignee

WMF GmbH · DE

Inventors

Cornelius Boerner · Kuchen, DE
Guenter Buehlmaier · Geislingen, DE
Wolfgang Friz · Göppingen, DE
Alexander Kiefer · Kuchen, DE
Martin Neumayer · Gerstetten, DE
Theda Staudinger · Geislingen, DE

Key dates

Filing date	Jan 29, 2008
Grant date	Jan 8, 2013
Priority date	—
Expiry date	May 6, 2029

Classification

Technology area (CPC A)Human Necessities
CPC primaryA47G21/00
WIPO fieldSurface technology, coating
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.