Patents by Inventor Michelle L. McMahon

Michelle L. McMahon 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).

  • Dispersant composition
    Patent number: 6863837
    Abstract: The present invention provides a sulfonated coal tar distillate salt polymer that is a condensation product of an aldehyde, preferably formaldehyde, and a sulfonated middle fraction obtained during coal tar distillation. The middle fraction includes from about 40% to about 95% by weight naphthalene and from about 5% to about 60% by weight of a plurality of compounds selected from the group consisting of quinoline, indene, biphenyl, indane, acenaphthene, anthracene, phenanthrene, methyl naphthalene, cresol, phenol, xylenol, and tetralin. The present invention also provides a method of forming a sulfonated coal tar distillate salt polymer.
    Type: Grant
    Filed: August 5, 2002
    Date of Patent: March 8, 2005
    Assignee: GEO Specialty Chemicals, Inc.
    Inventors: Arpad Savoly, Dawn P. Elko, Bennie Veal, Michelle L. McMahon, David B. Heller, Jr.
  • Dispersant composition
    Publication number: 20040020108
    Abstract: The present invention provides a sulfonated coal tar distillate salt polymer that is a condensation product of an aldehyde, preferably formaldehyde, and a sulfonated middle fraction obtained during coal tar distillation. The middle fraction includes from about 40% to about 95% by weight naphthalene and from about 5% to about 60% by weight of a plurality of compounds selected from the group consisting of quinoline, indene, biphenyl, indane, acenaphthene, anthracene, phenanthrene, methyl naphthalene, cresol, phenol, xylenol, and tetralin. The present invention also provides a method of forming a sulfonated coal tar distillate salt polymer.
    Type: Application
    Filed: August 5, 2002
    Publication date: February 5, 2004
    Inventors: Arpad Savoly, Dawn P. Elko, Bennie Veal, Michelle L. McMahon, David B. Heller