ALEXANDRIA, Va., April 15 -- United States Patent no. 12,601,576, issued on April 14.
"Sinter bonded projectile" was invented by Roger J. Smith (Barlett, Ill.).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention of the present subject matter relates to a sinter bonded projectile comprising a core component and a copper component which has been sintered in such a manner to form a solid mass over the core. More particularly, the invention of the present subject matter provides a core component to which a copper component is melted at a temperature sufficient that it penetrates into the pores and geometry of the core component under compression due to thermal shrinkage, resulting in a tightly bonded sol...