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:
Nov. 30, 1976
Filed:
Mar. 26, 1975
Gilbert C Robinson, Clemson, SC (US);
Arthur S Gillespie, Jr, Gastonia, NC (US);
Ricardo O Bach, Gastonia, NC (US);
Lithium Corporation of America, Gastonia, NC (US);
Abstract
Production of building bricks utilizing as an ingredient thereof, advantageously in substantial or in major proportion of brick-forming compositions or mixtures of ingredients, ore residues obtained from the extraction of lithium values from beta-spodumene. The said residues so utilized result from a process in which beta-spodumene is subjected to a sulfuric acid roast, the lithium values are then extracted from the acid-roast product by an aqueous extraction liquid, followed by neutralization with lime or limestone, and separation of the formed lithium sulfate by filtration, leaving the ore residues which are then utilized in admixture with other ingredients to produce bricks possessing excellent strength and other desirable properties.