Patents by Inventor Steven J. Heilmann

Steven J. Heilmann 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).

  • Bis(thiazolinethiones)
    Patent number: 4946962
    Abstract: Two classes of certain compounds known as bis(thiazolinethiones), more particularly bis[(3,4-disubstituted)-thiazole-2-thiones], have thiazolinethione heterocycle units linked by alkylene, arylene, or arene groups or by a carbon to carbon single bond. These compounds are useful in the graphic arts because of their reduced volatility, reduced migrating aptitude, and reduced hydrophilicity compared to mono thiazolinethiones.
    Type: Grant
    Filed: May 23, 1989
    Date of Patent: August 7, 1990
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Steven J. Heilmann, Larry R. Krepski, Jerald K. Rasmussen, Alan R. Katritzky, Richard D. Tarr