Patents by Inventor Steven M. Rice

Steven M. Rice 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).

  • Toner compositions and use
    Patent number: 6025105
    Abstract: A substantially chromium-free toner composition which comprises, as a negative charge control agent, one or more complexes of Formula 1: ##STR1## including other acceptable forms of such complex, in which: X+ is H+, Na+ or mixtures thereof; M is Fe or Co; R.sup.1 is sulphonyl or sulphamoyl, substituted by one or more C.sub.1-4 alkyl; and R.sup.2 is carboxy or phenylcarbamoyl, optionally substituted by one or more C.sub.1-4 alkyl; but when R.sub.1 is methylsulphonyl, R.sup.2 is not carboxy.
    Type: Grant
    Filed: February 18, 1998
    Date of Patent: February 15, 2000
    Assignee: Toshiba America Business Solutions, Inc.
    Inventors: Steven M. Rice, David Devonald, Shuitsu Sato