Patents by Inventor David J. Kowalski

David J. 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).

  • Fluorescent monomer and polymer
    Patent number: 5378784
    Abstract: 3-Hydroxy-2-methylene-3-(1-naphthyl)propionic acid, methyl ester and fluorescent water soluble polymers prepared therefrom.
    Type: Grant
    Filed: November 4, 1993
    Date of Patent: January 3, 1995
    Assignee: Nalco Chemical Company
    Inventors: Dodd W. Fong, David J. Kowalski
  • Process for producing sulfomethylamide polymers
    Patent number: 5004786
    Abstract: Polyacrylamide is reacted with formaldehyde and bisulfite at a temperature 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 6, 1989
    Date of Patent: April 2, 1991
    Assignee: Nalco Chemical Company
    Inventors: Dodd W. Fong, David J. Kowalski
  • Sulfomethylamide-containing polymers
    Patent number: 4762894
    Abstract: Polyacrylamide is reacted with formaldehyde and bisulfite at a temperature 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: January 12, 1987
    Date of Patent: August 9, 1988
    Assignee: Nalco Chemical Company
    Inventors: Dodd W. Fong, David J. Kowalski
  • Water-soluble cationic quaternary ammonium monomers
    Patent number: 4734473
    Abstract: The methyl chloride or dimethyl sulfate quaternary ammonium salt of 1-methacryloyl-4-methyl piperazine.
    Type: Grant
    Filed: December 3, 1986
    Date of Patent: March 29, 1988
    Assignee: Nalco Chemical Company
    Inventors: Dodd W. Fong, David J. Kowalski
  • Phosphonic acid-containing polymer
    Patent number: 4678840
    Abstract: A high temperature, pressurized process is described to synthesize phosphonated acrylamide polymers represented by the structure: ##STR1## wherein X is from the group H, OR, Cl, Br, I, --COOM, --SO.sub.3 M, ##STR2## and mixtures thereof.
    Type: Grant
    Filed: February 24, 1986
    Date of Patent: July 7, 1987
    Assignee: Nalco Chemical Company
    Inventors: Dodd W. Fong, David J. Kowalski
  • Water-soluble cationic quaternary ammonium monomers
    Patent number: 4656277
    Abstract: The methyl chloride or dimethyl sulfate quaternary ammonium salt of 1-methacryloyl-4-methyl piperazine.
    Type: Grant
    Filed: June 15, 1984
    Date of Patent: April 7, 1987
    Assignee: Nalco Chemical Company
    Inventors: Dodd W. Fong, David J. Kowalski
  • Water-soluble sulfonated polymers
    Patent number: 4546156
    Abstract: Novel water-soluble polymers and copolymers are synthesized by the free radical polymerization of vinyl addition monomers described generally by the formula: ##STR1## wherein: M is hydrogen, lithium, sodium, potassium, ammonium, magnesium, or calcium;R is allyl or methallyl;R.sub.1 is hydrogen, allyl or methallyl;R.sub.2 is hydrogen or sulfonato:R.sub.3 is hydrogen or sulfonato; and providing that R.sub.2 is not the same as R.sub.3.
    Type: Grant
    Filed: August 23, 1984
    Date of Patent: October 8, 1985
    Assignee: Nalco Chemical Company
    Inventors: Dodd W. Fong, David J. Kowalski
  • New water-soluble sulfonated monomers
    Patent number: 4490308
    Abstract: Novel water-soluble vinyl addition monomers are described generally by the formula: ##STR1## wherein: M is hydrogen, lithium, sodium, potassium, magnesium, or calcium;R is allyl or methallyl;R.sub.1 is hydrogen, allyl or methallyl;R.sub.2 is hydrogen or sulfonato:R.sub.3 is hydrogen or sulfonato; and providing that R.sub.2 is not the same as R.sub.3.
    Type: Grant
    Filed: June 30, 1983
    Date of Patent: December 25, 1984
    Assignee: Nalco Chemical Company
    Inventors: Dodd W. Fong, David J. Kowalski
  • Alkoxylated dioxolanes as paper sizing agents
    Patent number: 4295930
    Abstract: This invention concerns a new class of compositions for the sizing of paper and the method of treating paper using such compositions. Such new compositions comprise the reaction products of glyoxal and a hydrophobe which contains at least one hydroxyl group. Such compositions can be used either for internal or surface sizing.
    Type: Grant
    Filed: March 17, 1980
    Date of Patent: October 20, 1981
    Assignee: Nalco Chemical Company
    Inventors: Thomas Aitken, David J. Kowalski, K. G. Srinivasan