Patents by Inventor Mulk A. Arora

Mulk A. Arora 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).

  • Intermittent AC etching of aluminum foil
    Patent number: 4315806
    Abstract: Aluminum electrolytic capacitor foil is etched by subjecting the foil to etching for a period of time, followed by a rest period during which no etching takes place, subjecting the foil to etching for another period, followed by another rest period, and repeating these steps until the foil is etched to the desired level. An alternating current is used.
    Type: Grant
    Filed: September 19, 1980
    Date of Patent: February 16, 1982
    Assignee: Sprague Electric Company
    Inventor: Mulk A. Arora
  • AC Etching of aluminum capacitor
    Patent number: 4279714
    Abstract: Aluminum electrolytic capacitor foil is etched in a bath containing 0.7 to 2.O M hydrochloric acid, 0.2 to 0.5 M hydrated aluminum trichloride, and 0.02 to 0.4 M phosphate ion while subjected to the action of alternating current at 35 to 55.degree. C.
    Type: Grant
    Filed: September 15, 1980
    Date of Patent: July 21, 1981
    Assignee: Sprague Electric Company
    Inventors: Mulk A. Arora, John J. Randall, Jr.
  • Etching of aluminum capacitor foil
    Patent number: 4279715
    Abstract: Aluminum electrolytic capacitor foil is etched in a bath containing 1.0 to 1.8 M hydrochloric acid, 0.25 to 0.5 M aluminum chloride, 0.2 to 1.0 M phosphoric acid, and 1.0 to 2.0 M chromium trioxide while subjected to the action of alternating current at 35.degree. to 55.degree. C.
    Type: Grant
    Filed: September 15, 1980
    Date of Patent: July 21, 1981
    Assignee: Sprague Electric Company
    Inventors: Mulk A. Arora, John J. Randall, Jr., Walter J. Bernard