Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Gerald Felder0
Carmen Bier0
Date of Patent
November 2, 2010
Patent Application Number
12231671
Date Filed
September 3, 2008
Patent Primary Examiner
Patent abstract
A fastening element has a core zone (14) formed of a relatively hard carbon steel, a skin zone (17) located outwardly of the core zone (14) and formed of a first low-carbon austenitic steel alloyed with a first alloy metal, and an intermediate zone (15a, 15b) provided between the core zone (14) and the skin zone (17) and formed of a second low-carbon steel having a smaller hardness than the steel the core zone (14) is formed of.
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