Patents by Inventor I. Sergio Di Simone

I. Sergio Di Simone 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).

  • Oligomer-containing phosphate scale inhibitors
    Patent number: 5023000
    Abstract: Calcium carbonate scale is controlled by treating calcium carbonate containing waters with a predominantly phosphinate containing composition where has as its major ingredient more than 32 mole percent of a phosphinicosuccinic acid oligomer having the probable structural formula . ##STR1## M is H, Na, K, NH.sub.4, or mixtures thereof; and m and n are either 0 or a small whole number with proviso that either m or n is a small whole number and the sum of m plus n is greater than 2.
    Type: Grant
    Filed: May 10, 1990
    Date of Patent: June 11, 1991
    Assignee: Nalco Chemical Company
    Inventors: James F. Kneller, Barbara E. Fair, Gianfranco F. Mazzani, I. Sergio Di Simone