Patents by Inventor Gerald Kalin

Gerald Kalin 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).

  • Extrusion process for manufacturing PTFE products
    Patent number: 5505887
    Abstract: An improved extrusion method is employed in a process which is used to form tubing for medical applications. The method includes providing an extrusion apparatus having a die which includes a die cavity and a mandrel within the die cavity. The die is rotated in a first rotational direction while the mandrel is rotated in a second rotational direction opposite the first direction. While the die and the mandrel are rotating, a PTFE paste is passed through the annular passage defined between the die and the mandrel. The die cavity is cooled to maintain the PTFE paste passing therethrough at a substantially non-elevated temperature.
    Type: Grant
    Filed: March 10, 1994
    Date of Patent: April 9, 1996
    Assignee: Meadox Medicals, Inc.
    Inventors: Richard J. Zdrahala, Nicholas Popadiuk, Gerald Kalin, David J. Lentz