Patents by Inventor Rosemarie Toepfl

Rosemarie Toepfl 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).

  • Process for reinforcing nonwovens
    Patent number: 4044178
    Abstract: A process for reinforcing nonwovens by the foaming process accompanied by the use of binding agents and foaming assistants is provided. The nonwovens are treated with preparations which contain at least one binding agent and as foaming agents and a reactive surfactant which is converted into the irreversibly insoluble state at elevated temperature and thereby loses its surface activity. The treated nonwovens are then subjected to a heat treatment, time-consuming washing and rinsing procedures of the treated materials are not necessary.
    Type: Grant
    Filed: January 12, 1976
    Date of Patent: August 23, 1977
    Assignee: Ciba-Geigy Corporation
    Inventors: Heinz Abel, Rosemarie Toepfl, Luzius Schibler