Patents by Inventor Walter W. Pawlikowski, Jr.

Walter W. Pawlikowski, Jr. 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).

  • Method of making extruded article
    Patent number: 5011642
    Abstract: An extruded article is provided having a base element, and rib element attached to the base element along its entire length. The rib element is narrower at its attachment end than at its free end, and is undulated. The article is formed by extruding an extrudable plastic mass having a conformable state and a nonconformable state. The extrusion rate of the free end of the rib element is sufficiently faster than that of the base element causing the free end of the rib element to undulate without distortion as the structure is extruded. The plastic mass is then converted to the nonconformable state while maintaining the undulation in the free end of the rib element.
    Type: Grant
    Filed: November 13, 1989
    Date of Patent: April 30, 1991
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Dennis G. Welygan, Ronald O. Zemke, Walter W. Pawlikowski, Jr.
  • Extruded article and method of making same
    Patent number: 4828902
    Abstract: An extruded article is provided comprising a base element, and at least one rib element attached to the base element along its entire length. The rib element is narrower at its attachment end than at its free end, and is undulated.The article is formed by extruding an extrudable plastic mass having a conformable state and a nonconformable state. The extrusion rate of the free end of the rib element is sufficiently faster than that of the base element. The free end of the rib element will therefore undulate as the structure is extruded. The free end of the rib element is permitted to undulate without distortion of the base element while the plastic mass is in the conformable state. The plastic mass is then converted to the nonconformable state while maintaining the undulation in the free end of the rib element.
    Type: Grant
    Filed: June 5, 1987
    Date of Patent: May 9, 1989
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Dennis G. Welygan, Zemke, Ronald O., Walter W. Pawlikowski, Jr.