Patents by Inventor Petru Sabau

Petru Sabau 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).

  • Building sheeting and method of its manufacture
    Patent number: 5013591
    Abstract: A bituminous building sheeting which is compatible with hot mopping bitumen and bituminous cold adhesives and whose covering mass is modified with APP and IPP. The mass, homogenized under high shear forces is cooled off after the application of 180.degree. to 200.degree. C. at a cooling speed of not more than 120 K/min. Polymer spherulites form on the surface thereby which improve the adhesiveness and prevent oily components from exuding out of the bitumen.
    Type: Grant
    Filed: May 8, 1989
    Date of Patent: May 7, 1991
    Assignee: Rutgerswerke Aktiengesellschaft
    Inventors: Bert Haushofer, Ernst Scherp, Wilfried Schumacher, Petru Sabau