Patents by Inventor Josepha M. Fu

Josepha M. Fu 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).

  • Novel cationic hydroxamate polymers
    Patent number: 4886872
    Abstract: A polymer having a weight average molecular weight ranging from between about 1,000 to about 10,000,000 which polymer contains at least 5 mole percent of a pendant functional group represented by: ##STR1## and mixtures thereof; wherein R' is chosen from the group consisting of H, and lower linear or branched alkyl groups containing from one to six carbon atoms; and X is an anionic gegenion, present in an electroneutralizing amount.
    Type: Grant
    Filed: May 22, 1989
    Date of Patent: December 12, 1989
    Assignee: Nalco Chemical Company
    Inventors: Dodd W. Fong, Josepha M. Fu
  • Polyhydroxyamic acid polymers from polyacrylic acids
    Patent number: 4868248
    Abstract: Polyacrylic acid polymers are modified with hydroxylamine to convert a portion of the acrylic acid groups in the polymer to hydroxamic acid groups. The process requires utiization of a pH between 1-6 and a temperature ranging between 70.degree.-150.degree. C.
    Type: Grant
    Filed: March 22, 1989
    Date of Patent: September 19, 1989
    Assignee: Nalco Chemical Company
    Inventors: John W. Sparapany, Dodd W. Fong, Josepha M. Fu