Patents by Inventor David K. Kowalski

David K. Kowalski 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).

  • Sulfomethylamide-containing polymers
    Patent number: 5120797
    Abstract: Polyacrylamide is reacted with formaldehyde and bisulfite at a temperture of at least about 100.degree. C. and at an initial reaction mixture pH of less than about 12, preferably about 3 to about 8, to produce sulfomethylpolyacrylamide.
    Type: Grant
    Filed: October 23, 1991
    Date of Patent: June 9, 1992
    Assignee: Nalco Chemical Company
    Inventors: Dodd W. Fong, David K. Kowalski