US Patent Issued to CONSTELLIUM ISSOIRE on Sept. 23 for "Al-Zn-Cu-Mg alloys with high strength and method of fabrication" (French, American Inventors)

ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,421,578, issued on Sept. 23, was assigned to CONSTELLIUM ISSOIRE (Issoire, France).

"Al-Zn-Cu-Mg alloys with high strength and method of fabrication" was invented by Ricky Whelchel (Athens, Ohio), Erembert Nizery (Grenoble, France), Diana Koschel (Saint Jean de Moirans, France), Jean-Christophe Ehrstrom (Grenoble, France) and Timothy Warner (Corenc, France).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a rolled product made of aluminum alloy with a thickness of at least 50 mm comprising (in weight %): Zn 6.9-7.5; Mg 1.8-2.2; Cu 1.8-2.2, where the sum Cu+Mg is between 3.8 and 4.2; Zr 0.04-0.14; Mn 0-0.1; Ti 0-0.15; V 0-0.1; Fe l...