Patents by Inventor John Maden

John Maden 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).

  • Sulph(on)ation process
    Patent number: 4226796
    Abstract: Sulph(on)ation of organic feedstocks is performed with undiluted sulphur trioxide in a recycle loop reactor in which the feedstock is diluted with its recycled sulph(on)ation product, contact of the feedstock and sulphur trioxide occurs under conditions of turbulent flow and the recycle ratio is high.
    Type: Grant
    Filed: December 5, 1977
    Date of Patent: October 7, 1980
    Assignee: Albright & Wilson Limited
    Inventors: Brian J. Akred, Alan J. Lambie, John Maden