Patents by Inventor Sandra J. Alward

Sandra J. Alward 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).

  • Hydroconversion process for making lubricating oil basestocks
    Patent number: 6096189
    Abstract: A process for producing a lubricating oil basestock having at least 90 wt. % saturates and a VI of at least 105 by selectively hydroconverting a raffinate from a solvent extraction zone in a two step hydroconversion zone followed by a hydrofinishing zone.
    Type: Grant
    Filed: December 17, 1996
    Date of Patent: August 1, 2000
    Assignee: Exxon Research and Engineering Co.
    Inventors: Ian A. Cody, Douglas R. Boate, Sandra J. Alward, William J. Murphy, John E. Gallagher, Alberto Ravella, Richard A. Demmin
  • Raffinate hydroconversion process (JHT-9601)
    Patent number: 5976353
    Abstract: A process for producing a high VI/low volatility lubricating oil basestock. The process comprises subjecting the raffinate from a solvent extraction step to a two step, single stage hydroconversion process wherein the first step involves severe hydroconversion of the raffinate followed by a cold hydrofinishing step.
    Type: Grant
    Filed: June 28, 1996
    Date of Patent: November 2, 1999
    Assignee: Exxon Research and Engineering Co
    Inventors: Ian A. Cody, Douglas R. Boate, Sandra J. Alward, William J. Murphy, John E. Gallagher, Gary L. Harting
  • Aromatics extraction from hydrocarbon oil using tetramethylene sulfoxide
    Patent number: 5880325
    Abstract: Aromatic hydrocarbons are selectively extracted from lube oil stocks comprising mixtures of same with non-aromatic hydrocarbons using tetramethyl sulfoxide as the extraction solvent. The oils so extracted are the heavier oils, those boiling above about 200.degree. C. and identified as being at least lube base stock grade 60N and higher.
    Type: Grant
    Filed: September 7, 1993
    Date of Patent: March 9, 1999
    Assignee: Exxon Research and Engineering Company
    Inventors: Sandra J. Alward, William N. Hayter
  • Method for upgrading waxy feeds using a catalyst comprising mixed powered dewaxing catalyst and powdered isomerization catalyst formed into a discrete particle
    Patent number: 5770542
    Abstract: It has been discovered that waxy feeds can be upgraded using a catalyst made by combining powdered dewaxing catalyst with powdered isomerization catalyst said mixture of powdered catalysts being formed into a discrete particle.
    Type: Grant
    Filed: February 5, 1997
    Date of Patent: June 23, 1998
    Assignee: Exxon Research & Engineering Company
    Inventors: Dee Anne Brandes, David N. Zinkie, Sandra J. Alward
  • Method for upgrading waxy feeds using a catalyst comprising mixed powdered dewaxing catalyst and powdered isomerization catalyst formed into a discrete particle (LAW082)
    Patent number: 5723716
    Abstract: It has been discovered that waxy feeds can be upgraded using a catalyst made by combining powdered dewaxing catalyst with powdered isomerization catalyst said mixture of powdered catalysts being formed into a discrete particle.
    Type: Grant
    Filed: August 27, 1996
    Date of Patent: March 3, 1998
    Assignee: Exxon Research and Engineering Company
    Inventors: Dee Anne Brandes, David N. Zinkie, Sandra J. Alward
  • Tetralins or a combination of tetrlins and organic sulfides as lube oil anti-oxidants
    Patent number: 5453211
    Abstract: The oxidation stability of lube base oils is improved by the addition of tetralins or combination of tetralins and organic sulfides. The addition of tetralins or combination of tetralins and organic sulfides to formulated lube oils has also been found to improve the oxidation stability of such formulated oil.
    Type: Grant
    Filed: November 19, 1993
    Date of Patent: September 26, 1995
    Assignee: Exxon Research & Engineering Co.
    Inventor: Sandra J. Alward
  • Method for improving the oxidation stability of refined hydrocarbon oils
    Patent number: 4777307
    Abstract: The oxidation stability of a refined hydrocarbon oil can be sigificantly improved by adding at least one cyclic sulfide and at least one aromatic compound to said oil.
    Type: Grant
    Filed: December 14, 1987
    Date of Patent: October 11, 1988
    Assignee: Exxon Research and Engineering Company
    Inventors: Sandra J. Alward, Michael A. Fefer