Patents by Inventor Shaun Murphree

Shaun Murphree 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 preparation of low-salt, liquid dyestuff preparations
    Patent number: 6120561
    Abstract: Process for the preparation of low-salt liquid dyestuff preparations, characterized in that they are obtained by:a) diazotization of an aromatic amine,b) 2-fold coupling of the diazo component obtained according to a) to I-acid-urea, in the presence of an inorganic base and in the absence of an organic base,c) desalination and, if appropriate, concentration by means of a pressure permeation of the reaction mixture obtained according to b), so that an inorganic salt content of less than 1% by weight is achieved.
    Type: Grant
    Filed: April 17, 1997
    Date of Patent: September 19, 2000
    Assignee: Bayer Aktiengesellschaft
    Inventors: Peter Wild, Volker Paulat, Wolfgang Frank, Shaun Murphree
  • Process for the production of diazonium compounds with a low content of sodium ions
    Patent number: 5986075
    Abstract: The present invention relates to a process for desalting aqueous suspensions containing an organic diazonium compound and electrolytes containing Na ions, in which the aqueous suspension is passed through a semipermeable membrane.
    Type: Grant
    Filed: January 20, 1999
    Date of Patent: November 16, 1999
    Assignees: Bayer Corporation, Bayer Aktiengesellschaft
    Inventors: John C. DuBose, Andrew D. Johnson, Samuel Shaun Murphree, Edzard Tholema, Helmut Hoffmann, Wolfgang Zarges, Wolfgang Frank, Bettina Burkhardt