Patents by Inventor William A. Romanauskas

William A. Romanauskas 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).

  • Gradient separation apparatus
    Patent number: 3998383
    Abstract: A centrifuge rotor has vertically oriented peripheral cavities and/or adaptors configured to receive sample containers each having a length which exceeds its diamter. Each cavity and/or adaptor is provided with a cap and/or an adaptor cap which together provide a rigid support and seal for each sample container. With this apparatus the separation gradient reorients from horizontal during separation to vertical during sample removal providing the advantages of reduced separation time and improved resolution.
    Type: Grant
    Filed: July 16, 1975
    Date of Patent: December 21, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: William A. Romanauskas, Oakley L. Weyant