Patents by Inventor Franz C. Dunkl

Franz C. Dunkl 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).

  • High temperature electrolytic capacitor
    Patent number: 4479166
    Abstract: A high-temperature aluminum electrolytic capacitor contains an electrolyte of a salt of tert.butylamine and adipic acid in a 1.3 to 2.0 amine:acid molar ratio, a phosphate salt, and water dissolved in ethylene glycol to provide a capacitor capable of operating at least at 200 VDC and 130.degree. C.
    Type: Grant
    Filed: July 19, 1982
    Date of Patent: October 23, 1984
    Assignee: Sprague Electric Company
    Inventors: Manuel Finkelstein, Franz C. Dunkl, Sidney D. Ross