Patents by Inventor Ronald J. Rapp

Ronald J. Rapp 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).

  • Stabilizing SBR latex in cement formulations with low molecular weight polymers
    Patent number: 4436850
    Abstract: A composition comprising cement, a synthetic latex, preferably SBR latex, water and a low molecular weight polymer. The low molecular polymer preferably has a thermogravimetric value of less than 25 percent weight loss at 350.degree. C. The composition is useful in a method of making a cement composition containing an elastomeric latex.
    Type: Grant
    Filed: October 19, 1981
    Date of Patent: March 13, 1984
    Assignee: Allied Corporation
    Inventors: Patricia E. Burdick, Ronald J. Rapp