Patents by Inventor Susan E. Stefanik

Susan E. Stefanik 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).

  • Process for manufacturing a ceramic body having multiple barium-titanate phases
    Patent number: 4898844
    Abstract: A ceramic includes a dielectric ceramic body that is made by mixing powders of two barium titanate compositions of widely disparate Curie temperature with a minor quantity of a borate flux and a sintering-inhibitor such as titania or bismuth oxide. A body is formed of this start powders mixture. Upon sintering to maturity at about 1100.degree. C., the capacitor body becomes only partially co-reacted and has a dielectric constant around 2000 that varies no more than about 15% over a board operating temperature range. These properties are not a strong function of sintering conditions leading to good control at manufacturing.
    Type: Grant
    Filed: July 14, 1986
    Date of Patent: February 6, 1990
    Assignee: Sprague Electric Company
    Inventors: Galeb H. Maher, Susan E. Stefanik