Patents by Inventor Guido Grassi

Guido Grassi 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).

  • Oxyalkylated alkyl polyamines as defoaming agents
    Patent number: 4130589
    Abstract: The present invention concerns novel oxalkylated alkyl polyamines in free base, acid addition salt and/or quaternary ammonium salt form useful as anti-foaming agents.
    Type: Grant
    Filed: February 14, 1978
    Date of Patent: December 19, 1978
    Assignee: Sandoz Ltd.
    Inventors: Guido Grassi, Hans-Peter Baumann, Helmut Pummer