Patents by Inventor Willi Zummerli

Willi Zummerli 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 the manufacture of aminoplast and phenoplast moulding compositions using a fluidized bed drier
    Patent number: 4026864
    Abstract: Aminoplast or phenoplast moulding compositions are manufactured by passing an aqueous solution of a urea-formaldehyde resin, of an optionally phenol-modified melamine-formaldehyde resin or of a phenol-formaldehyde resin into a fluidized bed drier, by spraying the resin onto fillers and drying it. The compositions are used for crockery, household articles and technical components for the electrical industry.
    Type: Grant
    Filed: November 5, 1974
    Date of Patent: May 31, 1977
    Assignee: Ciba-Geigy Corporation
    Inventors: Hermann Diethelm, Peter Ruf, Willi Zummerli