Patents by Inventor Willadene S. Zierdt

Willadene S. Zierdt 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).

  • Patent number: 4081356
    Abstract: A device and method for the concentration of parasite eggs and larvae consisting of separable upper and lower chambers connected by a mid-piece which incorporates a filter of stainless steel gauze. The sample is emulsified in the upper chamber and is filtered into the lower chamber. Ether is added through the upper chamber and the mid-piece and upper chamber are removed. The lower chamber is shaken and centrifuged, the mid-plug of debris is removed, and the tube is drained and swabbed clean leaving a small sediment containing the parasite eggs and larvae. The sediment is removed by extraction with Lugol's iodine or saline to dilute the sediment.
    Type: Grant
    Filed: September 24, 1976
    Date of Patent: March 28, 1978
    Assignee: The United States of America as represented by the Department of Health, Education and Welfare
    Inventor: Willadene S. Zierdt