Patents by Inventor Samuel F. Heleba

Samuel F. Heleba 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).

  • Dry castable concrete compositions and methods of preparing and dry casting the same
    Patent number: 5250113
    Abstract: Dry castable concrete compositions having improved strength and resistance to aggressive chemicals are provided. The compositions comprise water, hydraulic cement, fine and coarse aggregate, and condensed silica fume, wherein the weight ratio of condensed silica fume to hydraulic cement is about 0.10 to 0.25, the water to cement weight ratio is about 0.18 to 0.33, and the mix has a slump of about 1/2 inch or less. Also provided is a method of preparing the dry castable compositions using aqueous condensed silica fume slurries and a method of dry casting the compositions.
    Type: Grant
    Filed: July 31, 1991
    Date of Patent: October 5, 1993
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Neal S. Berke, Samuel F. Heleba, Mario A. Tamez