Patents by Inventor Russel Andrew Stewart

Russel Andrew Stewart 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).

  • Thiophene synthesis
    Patent number: 5726326
    Abstract: A method of preparing a thiophene comprises reacting an organic compound containing a chain of at least 4 C atoms linked by single or double bonds with a source of sulphur in the vapor phase, in the presence of a supported catalyst, the catalyst having the composition(Fe.sub.0-1 M.sub.1-0)O.sub.nwherein M is a metal of Group VA, VIA or VIIA; and n is an appropriate value.
    Type: Grant
    Filed: June 24, 1996
    Date of Patent: March 10, 1998
    Assignee: Shell Research Limited
    Inventors: Graham John Hutchings, Richard William Joyner, Barry William Luke Southward, Russel Andrew Stewart, Lance Svend Fuller
  • Thiophene synthesis
    Patent number: 5723629
    Abstract: A method of preparing a thiophene comprises reacting an organic compound containing a chain of at least 4 C atoms linked by single or double bonds with a source of sulphur in the vapour phase, in the presence of a jarosite-type catalyst, having the compositionM(Fe.sub.0.8-1 Cr.sub.0.2-0)(OH).sub.6 X.sub.nwherein M is NH.sub.4 or an alkali metal; and X.sub.n represents one or more suitable anions.
    Type: Grant
    Filed: June 24, 1996
    Date of Patent: March 3, 1998
    Assignee: Shell Research Limited
    Inventors: Graham John Hutchings, Richard William Joyner, Barry William Luke Southward, Russel Andrew Stewart, Lance Svend Fuller