Patents by Inventor John C. J. Wirth

John C. J. Wirth 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).

  • Boring, mortising, tenoning and duplicating woodworking tool
    Patent number: 4593735
    Abstract: Apparatus for woodworking including boring, mortising, tenoning, forming dovetails, duplicating a three dimensional object, and the like. The invention embodies means for providing movement of a workpiece in a horizontal plane or X-Y direction, and means for providing vertical cutting tool movement.
    Type: Grant
    Filed: March 23, 1983
    Date of Patent: June 10, 1986
    Inventor: John C. J. Wirth, Jr.
  • Method for preserving the grinding characteristics of a grinding tool
    Patent number: 4239501
    Abstract: A grinding and cutting process and articles employing an effective amount of a grinding aid, typical of which is sodium nitrite which, when applied to the abradant or cutting edge of a tool, accelerates the modification of a metal workpiece and prolongs the useful life of the tool. The grinding aids of this invention are compounds free of sulfur and/or halogen and having a melting point in the range of 70.degree. F. to 1000.degree. F., a decomposition temperature at least 100.degree. F. above the melting temperature and a latent heat of melting greater than 10 cal/gm.
    Type: Grant
    Filed: March 7, 1978
    Date of Patent: December 16, 1980
    Inventor: John C. J. Wirth
  • Method for preserving the grinding characteristics of a grinding tool
    Patent number: 4095961
    Abstract: A grinding and cutting process and articles employing an effective amount of a grinding aid, typical of which is sodium nitrite which, when applied to the abradant or cutting edge of a tool, accelerates the modification of a metal workpiece and prolongs the useful life of the tool. The grinding aids of this invention are compounds free of sulfur and/or halogen and having a melting point in the range of 70.degree. F. to 1000.degree. F., a decomposition temperature at least 100.degree. F. above the melting temperature and a latent heat of melting greater than 10 cal/gm.
    Type: Grant
    Filed: November 5, 1976
    Date of Patent: June 20, 1978
    Inventor: John C. J. Wirth