Patents by Inventor Lawrence E. Helwig

Lawrence E. Helwig 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).

  • Silicate coated metal tying wire and process for coating said wire
    Patent number: 4246317
    Abstract: A metal tying wire product has an alkali or alkaline-earth, metal-silicate coating weighing at least 110 but not more than about 470 mg/ft.sup.2 of wire surface, the coating being baked at temperatures in the range of 700.degree.-1200.degree. F. until essentially all physically adsorbed water is driven off so as to achieve a knot joint efficiency of at least 70%. A process for producing a tying wire product with such coatings is also disclosed.
    Type: Grant
    Filed: March 26, 1979
    Date of Patent: January 20, 1981
    Assignee: United States Steel Corporation
    Inventor: Lawrence E. Helwig
  • Method for treating coated ferrous substrates
    Patent number: 3967984
    Abstract: An aqueous solution of 2.0 to 12.0 gm/l hexavalent chromium and 0.7 to 4.0 gm/l of sodium or ammonium bifluoride, adjusted to a pH of 2.7 to 5.5, is applied to coated (eg. Zn) ferrous substrates, metered to result in a final thickness of 0.8 to 2.0 mg of Cr per square foot of substrate surface, and thereafter dried to remove physically bound water.
    Type: Grant
    Filed: February 3, 1975
    Date of Patent: July 6, 1976
    Assignee: United States Steel Corporation
    Inventors: Lawrence E. Helwig, Richard A. Neish