Patents by Inventor Thomas E. Cravens

Thomas E. Cravens 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).

  • Low density rapid-setting polyurethanes
    Patent number: 4038238
    Abstract: Low density polyurethanes having the ability to reproduce mold detail in excellent quality from rapid-setting polyurethane-forming compositions are obtained by mixing a rapid-setting polyurethane-forming composition with light weight hollow spheres or microballoons and a liquid viscosity reducing agent such as xylene.
    Type: Grant
    Filed: August 29, 1973
    Date of Patent: July 26, 1977
    Assignee: The Dow Chemical Company
    Inventor: Thomas E. Cravens