Patents by Inventor Neil Portnoff

Neil Portnoff 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 cutting bit
    Patent number: 4865392
    Abstract: A rotatable cutting insert of improved geometry having a shank depending from a head portion and having a hard insert mounted therein, includes an insert having a conically shaped tip section, a base section contiguous with a first intermediate section, a second intermediate section contiguous with both tip and first intermediate section, and where the diameter of the second intermediate section is equal to the maximum diameter of the tip but is smaller than the diameter of the base section.
    Type: Grant
    Filed: July 16, 1987
    Date of Patent: September 12, 1989
    Assignee: GTE Products Corporation
    Inventors: Joe Penkunas, Neil Portnoff
  • Rotatable cutting bit
    Patent number: 4725099
    Abstract: A rotatable cutting insert of improved geometry having a shank depending from a head portion and having a hard insert mounted therein, includes an insert having a conically shaped tip section, a base section contiguous with a first intermediate section, a second intermediate section contiguous with both tip and first intermediate section, and where the diameter of the second intermediate section is equal to the maximum diameter of the tip but is smaller than the diameter of the base section.
    Type: Grant
    Filed: July 18, 1985
    Date of Patent: February 16, 1988
    Assignee: GTE Products Corporation
    Inventors: Joe Penkunas, Neil Portnoff
  • Rotatable cutting bit
    Patent number: RE38151
    Abstract: A rotatable cutting insert of improved geometry having a shank depending from a head portion and having a hard insert mounted therein, includes an insert having a conically shaped tip section, a base section contiguous with a first intermediate section, a second intermediate section contiguous with both tip and first intermediate section, and where the diameter of the second intermediate section is equal to the maximum diameter of the tip but is smaller than the diameter of the base section.
    Type: Grant
    Filed: August 20, 2001
    Date of Patent: June 24, 2003
    Assignee: Kennametal Inc.
    Inventors: Joe Penkunas, Neil Portnoff