Patents by Inventor Richard Frank Srna

Richard Frank Srna 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).

  • Selective destruction of certain algae
    Patent number: 4065875
    Abstract: A process is described for the selective destruction of Phaeodactylum cells in the presence of Thallasiosira cells by subjecting algae culture liquid containing these species to ultrasonic waves.
    Type: Grant
    Filed: September 17, 1976
    Date of Patent: January 3, 1978
    Assignee: University of Delaware
    Inventor: Richard Frank Srna