Patents by Inventor Szuchain F. Chen

Szuchain F. Chen 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).

  • Chromium-zinc anti-tarnish coating for copper foil
    Patent number: 5230932
    Abstract: A technique for improving the tarnish and oxidation resistance of copper and copper based ally material is disclosed. The material is electrolytically coated by immersion in an aqueous electrolyte containing sodium hydroxide, zinc ions and chromium (VI) ions. The deposited coating is a codeposited layer of zinc and chromium with a zinc to chromium ratio of from about 5:1 to about 12:1. The coating provides tarnish resistance at temperatures in excess of 190.degree. C. and is removable by immersion in sulfuric acid.
    Type: Grant
    Filed: March 20, 1992
    Date of Patent: July 27, 1993
    Assignee: Olin Corporation
    Inventors: Szuchain F. Chen, Nina Yukov, Lifun Lin, Chung-Yao Chao