Patents Represented by Attorney John J. Frur
  • Patent number: 4070521
    Abstract: A liquid composition, containing methylene chloride, can provide phosphate coatings on metal articles. In addition to the methylene chloride, the composition contains a phosphatizing proportion of phosphoric acid and a solubilizing solvent capable of solubilizing phosphoric acid in methylene chloride. Most critically, the composition contains water in an amount exceeding the proportion of phosphoric acid, yet, the water-containing liquid composition maintains liquid phase homogeneity. Phosphatized coatings of desirable water insolubility and unique characteristics are thereby obtained.
    Type: Grant
    Filed: July 28, 1976
    Date of Patent: January 24, 1978
    Assignee: Diamond Shamrock Corporation
    Inventors: Edward A. Rowe, Jr., William H. Cawley