Patents by Inventor Marshall B. Nelson

Marshall B. Nelson 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).

  • Preparation of alpha-olefin by ethenolysis
    Patent number: 5055628
    Abstract: Alpha-olefin is prepared from internal and/or vinylidene olefin by reacting the internal and/or vinylidene olefin with ethylene in the presence of a catalyst consisting essentially of Re.sub.2 O.sub.7 and B.sub.2 O.sub.3 on Al.sub.2 O.sub.3.
    Type: Grant
    Filed: September 11, 1990
    Date of Patent: October 8, 1991
    Assignee: Ethyl Corporation
    Inventors: Ronny W. Lin, Marshall B. Nelson, Bruce C. Peters
  • Olefin oligomer synlube process
    Patent number: 4950822
    Abstract: Unsaturated .alpha.-olefin oligomers are topped to remove monomer and dimer and then distilled to remove a trimer fraction leaving a residue of tetramer, pentamer and higher oligomers. The trimer fraction is hydrogenated to form saturated .alpha.-olefin oligomer suitable for use as a lubricant.
    Type: Grant
    Filed: June 27, 1988
    Date of Patent: August 21, 1990
    Assignee: Ethyl Corporation
    Inventors: Thomas J. Dileo, Marshall B. Nelson, Matthew J. Lynch
  • Olefin oligomer synlube process
    Patent number: 4935570
    Abstract: Synlubes having a consistently low pour point are made by feeding a promoter (e.g. water, alcohol) at a controlled rate over an extended time period to an .alpha.-olefin (e.g. 1-decene) in contact with boron trifluoride.
    Type: Grant
    Filed: June 27, 1988
    Date of Patent: June 19, 1990
    Assignee: Ethyl Corporation
    Inventors: Marshall B. Nelson, Matthew J. Lynch, Thomas J. DiLeo
  • Synlube process
    Patent number: 4902846
    Abstract: C.sub.8-14 .alpha.-olefins are oligomerized to a oligomer mixture containing a high content of tetramer by feeding the .alpha.-olefin to a reaction vessel at a controlled rate over an extended period and in the presence of BF.sub.3 and a promoter such as an alcohol.
    Type: Grant
    Filed: February 2, 1989
    Date of Patent: February 20, 1990
    Assignee: Ethyl Corporation
    Inventors: Thomas J. DiLeo, Matthew J. Lynch, Marshall B. Nelson, Ronny W. Lin
  • Process for preparing dialkyl phosphorochloridothioates
    Patent number: 4159289
    Abstract: An improved process for the preparation of O,O-dialkyl phosphorochloridothioates in which distillation to recover substantially pure product is carried out in presence of a solubilizing or suspending agent, for example, liquid hydrocarbons, particularly aromatics having at least 10 carbon atoms which have good sulfur solubility, higher boiling point than the product and are inexpensive; specifically, naphthalenes are useful.
    Type: Grant
    Filed: March 2, 1978
    Date of Patent: June 26, 1979
    Assignee: Ethyl Corporation
    Inventors: Alfred P. Anderson, R. Woodrow Wilson, Marshall B. Nelson