Patents by Inventor Foster Michael H.

Foster Michael H. 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).

  • Cationic polymers for sludge dewatering
    Patent number: 5093413
    Abstract: Water-in-oil emulsion polymers of cationic acrylamides to which are added small quantities of a hydroxyalkyl methacrylate and sodium formate. These polymers are useful as flocculants in sludge dewatering processes.
    Type: Grant
    Filed: March 4, 1991
    Date of Patent: March 3, 1992
    Assignee: Nalco Chemical Company
    Inventors: Bhupati R. Bhattacharyya, deceased, John W. Sparapany, Yvonne O. Dunn, Foster Michael H.