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. 24, 2015
Filed:
Jan. 17, 2013
The Penn State Research Foundation, University Park, PA (US);
Ryan P. Koseski, State College, PA (US);
John R. Hellmann, State College, PA (US);
Barry E. Scheetz, Lemont, PA (US);
The Penn State Research Foundation, University Park, PA (US);
Abstract
A process for producing proppants from waste mineralogical material. The process can include providing the waste mineralogical material in a form such as particles, fines, dust, powders, and the like, and forming a plurality of 'green' pellets from the waste mineralogical material. Thereafter, the plurality of green pellets are fed into a provided flame drop tower that has a combustion flame, a hot zone, and a collection basin located downstream from the hot zone. The plurality of green pellets pass through the hot zone, are melted and subsequently solidified in the shape of a sphere downstream from the hot zone to form vitrified glass spheres. In some instances, the vitrified glass spheres are subjected to a devitrification step.