Patents by Inventor Evgueniy A. Rzhanov

Evgueniy A. Rzhanov has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Rotatable endodontic instruments and methods for their manufacture
    Patent number: 8568142
    Abstract: A quasi-hyperbolic endodontic instrument having a cylindrical, elongated shaft with a radius that varies as a smooth, continuous curve along the length of the shaft and is larger near the distal portion of the file than near the proximal end of the file. The distal radius may be 10% or more larger than the proximal radius. This design provides a flexible file that minimizes the possibility of breaking, and ensures that if breakage does occur, it will occur near the handle, allowing the broken bit to be easily removed from the tooth canal. The instrument may further, or instead, have a metal cable connecting the cutting head to the handle to help reduce metal fatigue.
    Type: Grant
    Filed: July 31, 2010
    Date of Patent: October 29, 2013
    Inventors: Evgueniy A. Rzhanov, Anatoliy E. Rzhanov
  • Rotatable Endodontic Instruments and Methods for their Manufacture
    Publication number: 20110033821
    Abstract: A quasi-hyperbolic endodontic instrument having a cylindrical, elongated shaft with a radius that varies as a smooth, continuous curve along the length of the shaft and is larger near the distal portion of the file than near the proximal end of the file. The distal radius may be 10% or more larger than the proximal radius. This design provides a flexible file that minimizes the possibility of breaking, and ensures that if breakage does occur, it will occur near the handle, allowing the broken bit to be easily removed from the tooth canal. The instrument may further, or instead, have a metal cable connecting the cutting head to the handle to help reduce metal fatigue.
    Type: Application
    Filed: July 31, 2010
    Publication date: February 10, 2011
    Inventors: Evgueniy A. Rzhanov, Anatoliy E. Rzhanov