Patents by Inventor Robert J. Szczesniak

Robert J. Szczesniak 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).

  • Improved process for effecting electromagnetic bonding of plastic parts
    Patent number: 5453149
    Abstract: An improved electromagnetic bonding process wherein the plastic parts or components to be bonded are configured to be positioned with respect to each other at the point of bonding under a frictional or interference fitting relationship embraced by the interpositioning of thermoplastic electromagnetic bonding material at the bonding point whereupon an electromagnetic field is generated to melt thermoplastic electromagnetic bonding material thereby fusing the plastic parts or components. In a particularly preferred embodiment a plastic container is formed having hemispherically-shaped top and bottom closures bonded to a cylindrically-shaped body member.
    Type: Grant
    Filed: February 7, 1991
    Date of Patent: September 26, 1995
    Assignee: Ashland Oil Company
    Inventor: Robert J. Szczesniak