Patents by Inventor David W. Larkin

David W. Larkin 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).

  • Process for preparing basestocks having high VI using oxygenated dewaxing catalyst
    Patent number: 7429318
    Abstract: A process for preparing high VI lubricating oil basestocks comprising hydrotreating, hydrodewaxing and optionally hydrofinishing. The hydrotreated feedstock is hydrodewaxed using a dewaxing catalyst that has been selectively activated by oxygenate treatment. The hydrodewaxed product may then be hydrofinished.
    Type: Grant
    Filed: May 18, 2006
    Date of Patent: September 30, 2008
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Ian A. Cody, William J. Murphy, Sylvain Hantzer, David W. Larkin, John E. Gallagher, Jr., Jeenok T. Kim
  • Process for preparing basestocks having high VI
    Patent number: 7282137
    Abstract: A process for preparing high VI lubricating oil basestocks comprising hydrotreating, hydrodewaxing and optionally hydrofinishing. The hydrotreating step is under conditions such that the amount of conversion to 343° C. minus is less than 5 wt. % of the feedstock and the VI increase is less than 4 VI over the feedstock. Hydrodewaxing uses a low alpha catalyst and hydrofinishing is accomplished with a catalyst based on the M41S family.
    Type: Grant
    Filed: October 3, 2003
    Date of Patent: October 16, 2007
    Assignee: Exxonmobil Research and Engineering Company
    Inventors: Ian A. Cody, William J. Murphy, Sylvain Hantzer, David W. Larkin, John E. Gallagher, Jr., Jeenok T. Kim
  • Process for preparing basestocks having high VI using oxygenated dewaxing catalyst
    Patent number: 7077947
    Abstract: A process for preparing high VI lubricating oil basestocks comprising hydrotreating, hydrodewaxing and optionally hydrofinishing. The hydrotreated feedstock is hydrodewaxed using a dewaxing catalyst that has been selectively activated by oxygenate treatment. The hydrodewaxed product may then be hydrofinished.
    Type: Grant
    Filed: October 3, 2003
    Date of Patent: July 18, 2006
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Ian A. Cody, William J. Murphy, Sylvain Hantzer, David W. Larkin, John E. Gallagher, Jr., Jeenok T. Kim
  • High viscosity-index base stocks, base oils and lubricant compositions and methods for their production and use
    Publication number: 20040129603
    Abstract: This invention relates to base stocks and base oils that exhibit an unexpected combination of high viscosity index (130 or greater) and a ratio of measured-to-theoretical high-shear/low-temperature viscosity at −30C or lower and the methods of making them. Specifically, the present invention relates to low-volatility/low-viscosity lubricant base stocks, lubricant base stocks and base oils, formulated lubricant compositions or functional fluids comprising these base stocks and methods of making them. More particularly, this invention relates to lubricant compositions of low-temperature flow capability and low viscosity for passenger car motor lubricants of SAE 0W-XX grade (where XX=40 or lower), methods for optimizing fuel economy using the same, and methods or processes to produce them.
    Type: Application
    Filed: October 3, 2003
    Publication date: July 8, 2004
    Inventors: Kim Elizabeth Fyfe, Eugenio Sanchez, David J. Baillargeon, James William Gleeson, Ian Alfred Cody, William John Murphy, Sylvain S. Hantzer, David W. Larkin, John E. Gallagher, Jeenok T. Kim
  • Process for preparing basestocks having high VI
    Publication number: 20040108249
    Abstract: A process for preparing high VI lubricating oil basestocks comprising hydrotreating, hydrodewaxing and optionally hydrofinishing. The hydrotreating step is under conditions such that the amount of conversion to 343° C. minus is less than 5 wt. % of the feedstock and the VI increase is less than 4 VI over the feedstock. Hydrodewaxing uses a low alpha catalyst and hydrofinishing is accomplished with a catalyst based on the M41S family.
    Type: Application
    Filed: October 3, 2003
    Publication date: June 10, 2004
    Inventors: Ian A. Cody, William J. Murphy, Sylvain Hantzer, David W. Larkin, John E. Gallagher, Jeenok T. Kim