Patents by Inventor Judith E. Obetz

Judith E. Obetz 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).

  • Water-borne coating composition made from epoxy resin, first polymeric acid, tertiary amine and second polymeric acid
    Patent number: 4423165
    Abstract: Water-borne reaction products of (a) carboxyl-functional polymers; (b) polyepoxides; and (c) tertiary amines are blended with (d) carboxyl-functional polymers having an acid number dissimilar to that of (a). The resulting products are useful as film-forming components of coating compositions which can be spray-, flow-, dip-, roller-, or electro-coated and are especially useful for spray coating the inside of two-piece tin-plated steel cans of beverages and food. The coating compositions are useful as such or can be crosslinked with crosslinking agents such as a nitrogen resin.
    Type: Grant
    Filed: April 16, 1982
    Date of Patent: December 27, 1983
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Lee R. Harper, Judith E. Obetz, William H. Steinmetz