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:
May. 28, 2013
Filed:
May. 21, 2009
Ralph R. Sawtell, Gibsonia, PA (US);
Men Glenn Chu, Export, PA (US);
Ralph R. Sawtell, Gibsonia, PA (US);
Men Glenn Chu, Export, PA (US);
Alcoa Inc., Pittsburgh, PA (US);
Abstract
Molten metal of a first composition flows out of a first chamber via an open first control apparatus into a mold cavity. The first control apparatus is closed. A second control apparatus is opened. Molten metal of a second composition, different from the first composition, flows out of a second feed chamber via the second control apparatus into the mold cavity. At least a portion of the first composition metal in the mold cavity is sufficiently molten that an initial feed of the second composition molten metal mixes with the first composition molten metal in the mold cavity. An ingot is removed from the mold cavity, the ingot having top, middle, and bottom sections, the bottom section composed of metal of the first composition, the top section composed of metal of the second composition, and the middle section composed of a mixture of metal of the first and second compositions.