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:
Jul. 30, 1991
Filed:
Mar. 02, 1990
Applicant:
Inventors:
Larry Katz, Valley Stream, NY (US);
Michel Maillefer, Ballaigues, CH;
Pierre-Luc Maillefer, Ballaigues, CH;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61C / ;
U.S. Cl.
CPC ...
433102 ; 433165 ;
Abstract
The end of an instrument for the treatment of dental root-canals is coated with a layer of anti-friction material. The low coefficient of friction of the antifriction material and the fact that it renders the end of the instrument non cutting or non abrasive facilitates greatly the penetration of the instrument in the dental root-canal, especially when the canal is curved, and has the result that the instrument does not bite into the wall of the canal and does not exert thereon an action which is greater on the outside of the curve than on the inside thereof.