Patents by Inventor Richard Edward Robertson

Richard Edward Robertson 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).

  • Nickel-containing ethylene oligomerization catalyst and use thereof
    Patent number: 6825148
    Abstract: A process for the oligomerization of ethylene to a mixture of olefinic products having high linearity is provided, by using a catalyst comprising a reaction product of a simple divalent nickel salt; a boron hydride reducing agent; a water soluble base; a ligand selected from the group consisting of an o-dihydrocarbylphosphinobenzoic acid and alkali metal salts thereof; and a phosphite.
    Type: Grant
    Filed: April 10, 2001
    Date of Patent: November 30, 2004
    Assignee: Shell Oil Company
    Inventors: David Stephen Brown, Richard Edward Robertson
  • Nickel-containing ethylene oligomerization catalyst and use thereof
    Publication number: 20020173685
    Abstract: A process for the oligomerization of ethylene to a mixture of olefinic products having high linearity is provided, by using a catalyst comprising a reaction product of a simple divalent nickel salt; a boron hydride reducing agent; a water soluble base; a ligand selected from an o-dihydrocarbylphosphinobenzoic acid and alkali metal salt thereof; and, a phosphite.
    Type: Application
    Filed: April 10, 2001
    Publication date: November 21, 2002
    Inventors: David Stephen Brown, Richard Edward Robertson