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. 03, 1998
Filed:
May. 01, 1996
Applicant:
Inventors:
Derek E Heath, Johnson City, TN (US);
Jerry A Mooneyhan, Johnson City, TN (US);
Assignee:
Tulsa Dental Products, L.L.C., Tulsa, OK (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61C / ;
U.S. Cl.
CPC ...
433102 ; 408230 ;
Abstract
An endodontic instrument which comprises an elongate shank which has a tapered working length adjacent the pilot end, and at least two continuous helical flutes formed along the tapered working length. The flutes are non-uniformly separated in the axial direction, and they define a relatively broad helical land and at least one relatively narrow helical surface. In one embodiment, the helical surface is a relatively narrow helical land and in another embodiment, the helical surface is a sharp helical edge.