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:
Apr. 27, 2004
Filed:
Jun. 03, 2002
Applicant:
Inventors:
Assignee:
Federal-Mogul Friedberg GmbH, Friedberg, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02F 5/00 ; F16J 9/00 ; F16J 9/26 ;
U.S. Cl.
CPC ...
F02F 5/00 ; F16J 9/00 ; F16J 9/26 ;
Abstract
A piston ring for use in a cylinder of an internal combustion engine, which ring is nitride-hardened at least on the sliding surface between piston ring and cylinder wall. The nitride layer is composed of a precipitated layer and a compound layer, wherein the piston ring consists of a low-alloyed iron-base material and an oxide layer is deposited on the compound layer.
Horn, Ehrenfried. (2004). Piston ring with oxide-nitride composite layer (U.S. Patent No. 6726216). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6726216
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile