Patents by Inventor David S. Mitch

David S. Mitch 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).

  • Induction galvannealed electroplated steel strip
    Patent number: 5015341
    Abstract: Galvannealed electroplated steel strip. The strip is heated to an alloying temperature of at least about 427.degree. C. using an induction coil operated at a frequency to produce an eddy current penetration depth of one-half the strip thickness. The diffusion temperature and time are controlled to minimize the formation of brittle gamma alloy phases in the zinc/iron alloy coating.
    Type: Grant
    Filed: August 5, 1988
    Date of Patent: May 14, 1991
    Assignee: Armco Steel Company, L.P.
    Inventors: Franklin H. Guzzetta, Alan F. Gibson, David S. Mitch
  • Process for controlling zinc vapor in a finishing process for a hot dip zinc based coating on a ferrous base metal strip
    Patent number: 4557952
    Abstract: A process for controlling zinc vapor in a finishing process for a hot dip zinc based coating on a ferrous base metal strip in which the strip emerges from the coating bath into an enclosed chamber, by injecting high dew point gas into the chamber. The process is applicable on both a one side and two side coating process. Preferably the atmosphere has about 1-3% water vapor, by volume, for both one-sided and two-sided process.
    Type: Grant
    Filed: July 30, 1984
    Date of Patent: December 10, 1985
    Assignee: Armco Inc.
    Inventors: David S. Mitch, Lloyd W. Abrams, Jerry L. Arnold, Forrester Caudill, Thomas A. Compton, Steven L. Boston