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:
Sep. 11, 2007
Filed:
Feb. 01, 2003
Applicants:
Manfred Fischer, Leichlingen, DE;
Frank Munchow, Wermelskirchen, DE;
Inventors:
Manfred Fischer, Leichlingen, DE;
Frank Munchow, Wermelskirchen, DE;
Assignee:
Federal Mogul Burscheid GmbH, Burscheid, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F16J 9/26 (2006.01);
U.S. Cl.
CPC ...
Abstract
A piston ring for an internal combustion engine is made of steel and has an outer contact surface that is nitrated and coated to no more than 70 μm with a protective coating comprising nitrides of aluminum and/or silicium and/or zirconium in a matrix of chromium-nitride based material.