Patents by Inventor Fred M. Sonnenerg

Fred M. Sonnenerg 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).

  • Reducing lustrous carbon in the lost foam process
    Patent number: 5041465
    Abstract: The evaporative casting of molten metals has been shown to produce casting having smooth surfaces with significantly less sign of carbon deposits thereon by using a polystyrene containing a high temperature peroxide, tert-butyl cumyl peroxide.
    Type: Grant
    Filed: September 17, 1990
    Date of Patent: August 20, 1991
    Assignee: Arco Chemical Technology, Inc.
    Inventor: Fred M. Sonnenerg