Patents by Inventor Peter Harfmann

Peter Harfmann 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 regeneration of an aqueous process liquid of the amine-oxide process
    Patent number: 5847129
    Abstract: The invention is concerned with a process for the destruction of N-nitrosomorpholine in an aqueous solution containing N-nitrosomorpholine and a peroxidic oxidant, characterized in that said aqueous solution is exposed to ultraviolet radiation having a wavelength of substantially 254 nm.
    Type: Grant
    Filed: April 17, 1997
    Date of Patent: December 8, 1998
    Assignee: Lenzing Aktiengesellschaft
    Inventors: Peter Harfmann, Stephan Astegger