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:
Aug. 25, 1998
Filed:
Jun. 12, 1996
Applicant:
Inventor:
Donald H Duncan, Spruce Pine, NC (US);
Assignee:
Duncan Technologies, Spruce Pine, NC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B02C / ;
U.S. Cl.
CPC ...
241-4 ; 241 27 ; 241246 ; 241247 ;
Abstract
A superior grade of flake mica product may be produced by applying shear forces to sedimentary mica to delaminate it into flakes. Shear forces are applied by rotating a plurality of arcuate blades within a confined cylindrical chamber containing the mica, such that the mica is forced between an outer portion of each blade and the chamber. Each one of the arcuate blades is curved to define an end portion that is spaced from, and substantially concentric with, a portion of the cylindrical chamber.