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:
Jul. 31, 1984
Filed:
Jun. 04, 1979
John R McKinley, Claremont, CA (US);
John G Roeschlaub, Upland, CA (US);
Occidental Research Corporation, Irvine, CA (US);
Abstract
A process is disclosed for the separation of a mixture of particles containing differing concentrations of a selected component into three fractions of similar concentration of the selected component. The process comprises conditioning the mixture of particles with a hydrophobic or hydrophilic surface-active agent to selectively coat each of the particles relative to the concentration of the selected component in each particle. In combination with the surface-active agent there is provided a fluorescent dye which either adheres to the coated or non-coated particles. The mixture of conditioned particles is then irradiated to excite and induce fluorescence of the fluorescent dye to a degree sufficient to distinguish among the intensities of fluorescence of the fluorescent dye on the various particles. The particles are separated into concentrate, middling and tailing fractions based upon distinguishing among the intensities of fluorescence.