Patents by Inventor John B. Snell

John B. Snell 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).

  • Double grooved welding backup
    Patent number: 4205219
    Abstract: A double grooved, preferably ceramic, welding backup is provided. The welding backup has a generally planar working face with parallel grooves, the grooves being separated by a central ridge, there being substantially flat lands at the sides of the grooves.
    Type: Grant
    Filed: June 7, 1978
    Date of Patent: May 27, 1980
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: John B. Snell
  • Welding backup employing a train of knuckle-joint tiles
    Patent number: 4183454
    Abstract: Welding backup having a train of rigid, heat-resistant tiles, the contiguous ends of which have round surfaces which provide knuckle joints. The round surfaces terminate in matching stops which limit the knuckle motion in either direction to 5-20 degrees.
    Type: Grant
    Filed: May 12, 1978
    Date of Patent: January 15, 1980
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: John B. Snell