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:
Mar. 20, 2007
Filed:
Nov. 10, 2004
Paul J. Conroy, Churchville, MD (US);
Charles S. Leveritt, Jarrettsville, MD (US);
John D. Demaree, Baltimore, MD (US);
James Hirvonen, Havre de Grace, MD (US);
Paul J. Conroy, Churchville, MD (US);
Charles S. Leveritt, Jarrettsville, MD (US);
John D. Demaree, Baltimore, MD (US);
James Hirvonen, Havre de Grace, MD (US);
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Abstract
A dynamic process for increasing the wear life of ferrous articles subjected to a high-temperature environment created by combustion of a propellant or fuel comprises selecting the propellant or fuel so that its combustion products include relatively large amounts of nitrogen, which nitrogen forms a protective nitride layer on the surface of the ferrous article. Disclosed is a specific embodiment of the invention for prolonging the wear life of gun barrels.