Patents by Inventor Veronika Rehm

Veronika Rehm 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).

  • Method of producing open-pore sintered glass filters and product
    Patent number: 4927442
    Abstract: Filter bodies are made by mixing borosilicate glass powder, potassium sulphate and 30% aqueous polyethylene glycol solution per kilogram of mixture. The mixture is filtered and dried and glass particles of a different size are mixed into the dried granulate. The resulting mixture is compressed at a pressure of 1000 bar to form blanks and sintered at about 860.degree. C. After cooling, the potassium sulphate is washed out of the blanks.
    Type: Grant
    Filed: March 14, 1989
    Date of Patent: May 22, 1990
    Assignee: Schott Glaswerke
    Inventors: Norbert Greulich, Werner Kiefer, Veronika Rehm