Patents by Inventor Peter D. Tsakanikas

Peter D. Tsakanikas 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 converting chromium dioxide magnetic pigment particles into nonmagnetic chromium (III) oxide
    Patent number: 5342589
    Abstract: According to a process for converting chromium dioxide into chromium (III) oxide, a composite comprising chromium dioxide particles dispersed in an organic matrix is provided. In a first heating step, a feed consisting essentially of the composite is heated under conditions sufficient to convert the feed into an admixture comprising chromium oxide and carbon. In a second heating step, the admixture is heated under conditions such that substantially all of the chromium oxide in the admixture is converted into chromium (III) oxide. In preferred embodiments, the composite is a chromium dioxide-based magnetic recording medium.
    Type: Grant
    Filed: September 22, 1992
    Date of Patent: August 30, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Peter D. Tsakanikas, Joseph M. Osborne