Patents by Inventor Thomas D. Hayden

Thomas D. Hayden 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).

  • Corrosion inhibiting additive for cement compositions
    Patent number: 4466834
    Abstract: Additive compositions for Portland cement compositions are disclosed which provide the corrosion inhibition of calcium nitrite without the corresponding set acceleration. The additive compositions are stable, single phase aqueous solutions consisting essentially of water and, as solutes, a major amount by weight of calcium nitrite and a minor amount by weight of corn syrup, a hydroxycarboxylic acid, or an alkali metal or alkaline earth metal salt of a hydroxycarboxylic acid.
    Type: Grant
    Filed: January 3, 1983
    Date of Patent: August 21, 1984
    Assignee: W. R. Grace & Co.
    Inventors: Vance H. Dodson, Thomas D. Hayden