Patents by Inventor Peter Harry Havranek

Peter Harry Havranek 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).

  • Refractory linings
    Patent number: 4061501
    Abstract: A refractory material contains a small quantity of colloidal silica. The colloidal silica increases the resistance of the material against aggressive slags.
    Type: Grant
    Filed: October 6, 1975
    Date of Patent: December 6, 1977
    Assignee: Hoganas AB
    Inventors: Paul Lennart Ivarsson, Peter Harry Havranek