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:
Aug. 11, 2026
Filed:
Apr. 10, 2024
Mahle International Gmbh, Stuttgart, DE;
Fabio Mendes De Araujo, Waterford, MI (US);
Luiz Felipe Viegas Rosa Rezende, Itajubá, BR;
Nikhil Nachappa Tychodianda Kushalappa, Bloomfield Hills, MI (US);
Samuel Jose Muniz De Toledo, Itajubá, BR;
Mahle International GmbH, , DE;
Abstract
A piston ring and method of forming includes a base portion formed of a metallic material, an outer contact surface and an inner contact surface extending between a first face and a second face that is opposite the first face of the piston ring, a chromium coating layer on the second face, the outer contact surface, and the inner contact surface, a layer of diamond-like carbon (DLC) disposed over the chromium coating layer on the outer contact surface, and a phosphate layer on a first face.