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:
Feb. 28, 1989
Filed:
Aug. 10, 1987
Anthony W Worcester, Oakville, MO (US);
Kai Ravnborg, Herculaneum, MO (US);
Carlos E Aguirre, Downingtown, PA (US);
The Doe Run Company, Herculaneum, MO (US);
Abstract
A method of alloying powdered aluminum into lead to form lead-calcium-aluminum alloys with relatively high recoveries and low standard deviations of recoveries. The method comprises melting lead, heating the lead, injecting simultaneously calcium-containing granules and aluminum powder into the lead under the surface. The alloying material preferably has a total calcuim content of between about 65% and 80% by weight and a total aluminum content of between about 35% and 20%. The material is preferably injected into an injection bell to hold the alloying material under the surface of the lead.