Patents by Inventor Leo J. Kadehjian

Leo J. Kadehjian 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).

  • Formulations for ink jet printing
    Patent number: 4286989
    Abstract: An ink for use in ink jet printing has as its coloring material a dye having the formula: ##STR1## where R is --OCH.sub.2 CO.sub.2.sup.-, --CH.sub.2 CO.sub.2.sup.-, --PO.sub.3.sup.= or --CH.sub.2 --PO.sub.3.sup.=.
    Type: Grant
    Filed: September 30, 1980
    Date of Patent: September 1, 1981
    Assignee: International Business Machines Corporation
    Inventors: Leo J. Kadehjian, Harbans S. Sachdev, Clinton D. Snyder