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:
Jun. 02, 1981
Filed:
Sep. 17, 1979
John E Nash, Downington, PA (US);
Syntex Inc., Palo Alto, CA (US);
Abstract
A dental tool for generating a relatively smooth surface on tooth enamel comprises an elongated shank with an operative end and an end adapted to engage a chuck of a dental handpiece. Any cross-section of the operative end perpendicular to the shank's longitudinal axis is circular with a diameter of less than 0.140 inch. Adjacent, continuous annular grooves extend around the operative end, each groove being defined by a pair of inwardly sloping side surfaces intersecting with each other at least about 0.010 inch from the shank's longitudinal axis and forming an included angle of 60.degree. to 150.degree. between the side surfaces. An abrasive material, such as diamond grit, having a particle size of less than 0.006 inch covers at least a portion of each surface.