Patents by Inventor Franz S. Dunkl

Franz S. 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).

  • Electrolytic capacitor
    Patent number: 4428028
    Abstract: An aluminum or tantalum electrolytic capacitor contains an electrolyte system utilizing 3-methoxypropionitrile as solvent. This system includes a stable solute chosen from amine-glycol-borates, condensed phosphates, and complex boro-phenolates to provide a system having a room-temperature resistivity of up to 1000 ohm-cm.
    Type: Grant
    Filed: November 12, 1981
    Date of Patent: January 24, 1984
    Assignee: Sprague Electric Company
    Inventors: Sidney D. Ross, Franz S. Dunkl
  • AC Electrolytic capacitor electrolyte
    Patent number: 4376713
    Abstract: An electrolyte for an AC motor-start electrolytic capacitor consists essentially of 10 to 40 wt % mono(diethylammonium) or mono(triethylammonium) adipate as solute in ethylene glycol as solvent.
    Type: Grant
    Filed: December 21, 1977
    Date of Patent: March 15, 1983
    Assignee: Sprague Electric Company
    Inventor: Franz S. Dunkl
  • High temperature electrolytic capacitor
    Patent number: 4373177
    Abstract: A high-temperature aluminum electrolytic capacitor contains an electrolyte of mono(di-n-propylammonium) adipate or mono(diisopropylammonium) adipate, 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: September 30, 1981
    Date of Patent: February 8, 1983
    Assignee: Sprague Electric Company
    Inventors: Manuel Finkelstein, Franz S. Dunkl, Sidney D. Ross
  • Electrolytic capacitor for at least 200 V service
    Patent number: 4373176
    Abstract: An aluminum electrolytic capacitor capable of operation at 200 VDC or higher and 130.degree. C. contains as its electrolyte a tertiary amine or a dipropylamine mono salt of dodecanedioic acid dissolved in a solvent mixture of ethylene glycol and N-methyl-2-pyrrolidinone and water.
    Type: Grant
    Filed: September 30, 1981
    Date of Patent: February 8, 1983
    Assignee: Sprague Electric Company
    Inventors: Manuel Finkelstein, Sidney D. Ross, Franz S. Dunkl
  • Electrolytic capacitor containing a metatungstate electrolyte
    Patent number: 4245278
    Abstract: An electrolytic capacitor contains as electrolyte a metatungstate salt dissolved in a polar solvent. The salt is preferably an ammonium or amine salt, and the solvent consists essentially of at least one polar organic solvent and water.
    Type: Grant
    Filed: March 21, 1979
    Date of Patent: January 13, 1981
    Assignee: Sprague Electric Company
    Inventors: Manuel Finkelstein, Franz S. Dunkl, Sidney D. Ross
  • Capacitor containing anthranilate electrolyte
    Patent number: 4242722
    Abstract: An electrolytic capacitor contains an electrolyte of ammonium anthranilate dissolved in a polar organic solvent.
    Type: Grant
    Filed: March 21, 1979
    Date of Patent: December 30, 1980
    Assignee: Sprague Electric Company
    Inventors: Sidney D. Ross, Manuel Finkelstein, Franz S. Dunkl
  • Non-aqueous electrolytic capacitor electrolyte
    Patent number: 4189761
    Abstract: A non-aqueous electrolyte for an electrolytic capacitor contains as solute a salt obtained from an amine and a trialkyl phosphate.
    Type: Grant
    Filed: August 12, 1977
    Date of Patent: February 19, 1980
    Assignee: Sprague Electric Company
    Inventors: Manuel Finkelstein, Franz S. Dunkl, Sidney D. Ross
  • Anodization of electrolytic capacitor sections
    Patent number: 4155154
    Abstract: Wound foil electrolytic capacitor sections are anodized after winding. After removal of the formation electrolyte, the sections are rinsed, dried, and impregnated with working electrolyte. The sections are assembled by usual means into capacitors.
    Type: Grant
    Filed: October 6, 1977
    Date of Patent: May 22, 1979
    Assignee: Sprague Electric Company
    Inventors: Mark Markarian, Francis J. Gamari, Franz S. Dunkl
  • Electrolytic capacitor
    Patent number: 4117531
    Abstract: An electrolyte system for electrolytic capacitors contains as solute an ammonium or amine salt of an amic acid or an amate. These salts may be obtained by the reaction of maleic, succinic, phthalic, or hexahydrophthalic anhydride with ammonia or an amine.
    Type: Grant
    Filed: May 25, 1977
    Date of Patent: September 26, 1978
    Assignee: Sprague Electric Company
    Inventors: Sidney D. Ross, Franz S. Dunkl, Manuel Finkelstein
  • Electrolytic capacitor with an electrolyte including dibasic acid compounds
    Patent number: 4110817
    Abstract: An aluminum electrolytic capacitor includes an electrolyte solute of ammonium succinate or ammonium adipate in combination with ammonium succinamate, succinamic acid, succinamide, or succinimide.
    Type: Grant
    Filed: July 16, 1976
    Date of Patent: August 29, 1978
    Assignee: Sprague Electric Company
    Inventors: Sidney D. Ross, Franz S. Dunkl