Patents by Inventor Daniel S. Zaharko

Daniel S. Zaharko 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: 3946734
    Abstract: The subject invention is directed to an apparatus which selectively contr the rate with which a drug contained therein is released to surrounding tissue. Moreover, the subject invention is directed to process for controlling said release which comprises sealing the end of a suitable vessel with a non-porous material, inserting into said vessel a suitable medicament, and sealing the opposite end thereof with a porous neutral hydrogel through which naturally occuring materials can diffuse and further through which said medicament may diffuse.
    Type: Grant
    Filed: February 19, 1975
    Date of Patent: March 30, 1976
    Assignee: The United States of America as represented by the Secretary of State
    Inventors: Robert L. Dedrick, Robert J. Lutz, Daniel S. Zaharko