Patents by Inventor Chiara F. Ferraris

Chiara F. Ferraris 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).

  • Additives for hydraulic cement compositions
    Patent number: 5294256
    Abstract: The present invention provides additives for hydraulic cement compositions, particularly masonry cements, which improve the water-repellancy, workability, and board life of said compositions. The additives of the invention comprise a water-insoluble, water-repelling acid, a set retarding composition, an emulsifier, and a polymer selected from the group consisting of polyvinyl alcohol, polyvinyl acetate, hydroxypropyl substituted polysaccharides, and mixtures thereof.
    Type: Grant
    Filed: July 28, 1992
    Date of Patent: March 15, 1994
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Willis A. Weigand, Chiara F. Ferraris, James M. Gaidis, Ellis M. Gartner
  • Processing additive for high-pressure roll press process of forming finish grind cement
    Patent number: 5203512
    Abstract: An improved high-pressure roll press process for forming finish ground cement is disclosed and is achieved by treating the material entering the roll press with a small amount of a hydroxyl or alkoxyl compound selected from lignin, phenol or monopropylene glycol or mixtures thereof.
    Type: Grant
    Filed: February 7, 1992
    Date of Patent: April 20, 1993
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Chiara F. Ferraris, Ellis M. Gartner, David F. Myers
  • Concrete surface air void reduction admixture
    Patent number: 5180430
    Abstract: A method of reducing the surface voids and imperfections of molded cement structures by forming the cement composition with an admixture comprising a combination of Welan Gum and a water reducing agent.
    Type: Grant
    Filed: October 16, 1991
    Date of Patent: January 19, 1993
    Assignee: W.R. Grace & Co.-Conn.
    Inventors: Ellis M. Gartner, Chiara F. Ferraris