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. 09, 1995
Filed:
Jun. 17, 1992
Steven H Peterson, Murrysville, PA (US);
Edward J Lahoda, Edgewood Borough, PA (US);
David C Grant, Gibsonia, PA (US);
Edward F Sverdrup, North Huntingdon, PA (US);
Thomas V Congedo, Edgewood, PA (US);
John Bartko, State College, PA (US);
Robert E Witkowski, West Mifflin, PA (US);
Arthur L Wolfe, Murrysville, PA (US);
William D Partlow, Forest Hills, PA (US);
Michael C Skriba, Irvine, CA (US);
Westinghouse Electric Corporation, Pittsburgh, PA (US);
Abstract
The concentrations of residual heavy metal contaminants in the particulate material in a slurry produced in a particulate material washing process are monitored on-line and can be used to control the washing process. In alternative embodiments of the invention, x-rays, thermal neutrons or laser beams are directed at the slurry as it flows through a flow cell to induce emission of secondary x-rays, gamma rays or light, respectively, characteristic of the heavy metal contaminants and constituents representative of the solids contents of the slurry. These characteristic energies are measured and used to determine the concentration in ppm of the residual heavy metal contaminants in the particulate material within the slurry.