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. 03, 1992
Filed:
May. 20, 1992
Steven W Graville, Eugene, OR (US);
Clifford C Reese, Midland, MI (US);
Dow Corning Corporation, Midland, MI (US);
Abstract
The present invention is a simple method for densifying colloidal silica. The method comprises feeding colloidal silica, recovered from a smelting process and having a density within a range of about 50 kg/m.sup.3 to 300 kg/m.sup.3, by a nearly horizontal feed means to a pair of vertically juxtaposed pressure rolls having surface depressions positioned so that the surface depressions of one roll corresponds to the undepressed surface portions of the other roll. The method does not require deaeration of the colloidal silica prior to densification and can be run as a continuous process. Colloidal silica densified by the present process is especially suitable for use as a reinforcing agent for concrete.