Patents by Inventor Stephen Nell Vaughn

Stephen Nell Vaughn 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).

  • Crystalline Intergrowth Material, Its Synthesis And Its Use In The Conversion Of Oxygenates To Olefins
    Publication number: 20100028679
    Abstract: A silicoaluminophosphate molecular sieve is disclosed that comprises first and second intergrown phases of a CHA framework type and an AEI framework type, wherein said first intergrown phase has an AEI/CHA ratio of from about 5/95 to about 40/60 as determined by DIFFaX analysis, the second intergrown phase has an AEI/CHA ratio of about 30/70 to about as determined by DIFFaX analysis and said molecular sieve has a silica to alumina molar ratio (Si/Al2) from about 0.13 to about 0.24.
    Type: Application
    Filed: October 8, 2009
    Publication date: February 4, 2010
    Inventors: Machteld M. Mertens, An Verberckmoes, Marcel J. Janssen, Yun Feng Chang, Luc R.M. Martens, Stephen Nell Vaughn, Kenneth Ray Clem, Wilfried J. Mortier
  • Catalyst fluidization in oxygenate to olefin reaction systems
    Patent number: 7084319
    Abstract: The present invention provides various processes for fluidizing molecular sieve catalyst compositions in a fluidized bed reaction system. The invention comprises fluidizing a molecular sieve catalyst composition with a reactive fluidizing medium under conditions effective to convert at least a portion of the fluidizing medium to additional product. The invention is ideally suited for implementation into an oxygenate to olefin reaction system, in which the fluidizing medium optionally comprises byproducts of the oxygenate to olefin conversion reaction.
    Type: Grant
    Filed: December 5, 2003
    Date of Patent: August 1, 2006
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Keith Holroyd Kuechler, Nicolas P. Coute, Jeffrey Scott Smith, Stephen Harold Brown, Richard B. Hall, Teng Xu, Stephen Nell Vaughn