The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 17, 2016
Filed:
Nov. 28, 2011
Applicant:
Wilfried Pinzl, Tambach-Dietharz, DE;
Inventor:
Wilfried Pinzl, Tambach-Dietharz, DE;
Assignee:
EJOT GMBH and Co. KG, Bad Berleburg, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D 9/00 (2006.01); C23C 8/04 (2006.01); C23C 8/80 (2006.01); C23C 8/02 (2006.01); F16B 35/00 (2006.01);
U.S. Cl.
CPC ...
C21D 9/0093 (2013.01); C23C 8/02 (2013.01); C23C 8/04 (2013.01); C23C 8/80 (2013.01); F16B 35/00 (2013.01); C21D 2221/00 (2013.01);
Abstract
The invention relates to a screw having a head, an adjoining retaining section and a functional tip for use as a self-tapping screw. The functional tip is of greater hardness than the retaining section. The entire screw is made of hardened low-alloy carbon steel. The special feature of this screw is that its functional tip has a higher carbon and/or nitrogen content than its retaining section.