Patents by Inventor Roland Varecka

Roland Varecka 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).

  • Spin filter for removing substantially cell-free culture medium from suspension cell culture system
    Patent number: 5019512
    Abstract: A spin filter for removing substantially cell-free medium from a stirred suspension culture vessel, wherein a stationary baffle is arranged in the interior space of the spin filter to disrupt liquid flow therein and minimize the tendency of cells to collect on and foul the inner-facing filter surfaces, the filter surface being sized to substantially exclude materials greater than about 8 to 10 microns, and the spin filter being rotatable independent of, and in a rotational direction opposite to, the vessel stirring device.
    Type: Grant
    Filed: March 17, 1989
    Date of Patent: May 28, 1991
    Assignee: Baxter International Inc.
    Inventors: Roland Varecka, Rudolf F. Bliem