Firearms – Barrels
Reexamination Certificate
2007-03-20
2007-03-20
Carone, Michael J. (Department: 3641)
Firearms
Barrels
C089S014050
Reexamination Certificate
active
10985067
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.
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Fernandez Guillermet et al, “Thermodynamic Analysis of the Fe-N System Using the Compound-Energy Model with Predictions of the Vibrational Entropy”, Z. Metallkd. 85 (1994) 3, pp. 154-163.
Conroy Paul J.
Demaree John D.
Hirvonen James
Leveritt Charles S.
Adams William W.
Carone Michael J.
Hayes Bret
Randolph William
The United States of America as represented by the Secretary of
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