Patents by Inventor Barbara Jean Schultz

Barbara Jean Schultz 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).

  • Hollow sphere organic pigment for paper or paper coatings
    Patent number: 6139961
    Abstract: A hollow sphere organic pigment in which a core containing a void is encapsulated by a first shell polymer having a glass transition temperature greater than 50.degree. C., the first shell having polymerized thereon a second shell polymer having a glass transition temperature of -15.degree. C. to -50.degree. C. is provided. Also provided is a paper or paperboard coating composition containing the hollow sphere organic pigment, a method for improving the strength and opacity of a paper or paperboard coating by using the coating composition dried, a coated paper or paperboard bearing the dried coating composition, and a method for improving the strength and opacity of paper or paperboard by incorporating a particular hollow sphere organic pigment into the formed wet sheet.
    Type: Grant
    Filed: May 6, 1999
    Date of Patent: October 31, 2000
    Assignee: Rohm and Haas Company
    Inventors: Robert Mitchell Blankenship, William Christopher Finch, Lubomir Mlynar, Barbara Jean Schultz