Patents by Inventor Norbert B. Intorp

Norbert B. Intorp 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).

  • Zinc phosphate conversion coating composition
    Patent number: 4498935
    Abstract: An aqueous acidic zinc phosphate coating composition for treating a metal surface to provide a conversion coating thereon, the composition comprising chlorate anion and an aromatic nitro anion in a weight ratio of less than 2:1 to about 1:10.
    Type: Grant
    Filed: July 13, 1981
    Date of Patent: February 12, 1985
    Assignee: Parker Chemical Company
    Inventors: Gary D. Kent, Norbert B. Intorp, Thomas H. Springstead