Patents by Inventor Gretchen L. Holtzer

Gretchen L. Holtzer 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).

  • High viscosity high quality group II lube base stocks
    Patent number: 9487723
    Abstract: Provided are high viscosity high quality Group II lube base stocks with improved properties produced by an integrated hydrocracking and dewaxing process. In one form, the Group II lube base stock includes greater than or equal to 90 wt. % saturates, and less than 10 wt. % aromatics, and has an aromatic performance ratio between 1.0 and 5.0. Also provided are lubricant formulations including the high viscosity high quality Group II lube base stock.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: November 8, 2016
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Gretchen L. Holtzer, Ajit B. Dandekar, Charles L. Baker, Jr., Bradley R. Fingland, Bryan E. Hagee, Cathleen Yung, Frank C. Wang, Eugenio Sanchez, Rugved Prakash Pathare
  • PRODUCTION OF LUBRICANT BASE OILS FROM DILUTE ETHYLENE FEEDS
    Publication number: 20140275669
    Abstract: Methods are provided for oligomerizing a dilute ethylene feed to form oligomers suitable for use as fuels and/or lubricant base oils. The fuels and/or lubricant base oils are formed by oligomerization of impure dilute ethylene with a zeolitic catalyst, where the zeolitic catalyst is resistant to the presence of poisons such as sulfur and nitrogen in the ethylene feed. The oligomers can also be formed in presence of diluents such as light paraffins.
    Type: Application
    Filed: March 4, 2014
    Publication date: September 18, 2014
    Applicant: ExxonMobil Research and Engineering Company
    Inventors: Michel Daage, Stephen H. Brown, Eugenio Sanchez, Nazeer A. Bhore, Robert Charles William Welch, Gretchen L. Holtzer, Arthur Thomas Andrews
  • HIGH VISCOSITY HIGH QUALITY GROUP II LUBE BASE STOCKS
    Publication number: 20130264246
    Abstract: Provided are high viscosity high quality Group II lube base stocks with improved properties produced by an integrated hydrocracking and dewaxing process. In one form, the Group II lube base stock includes greater than or equal to 90 wt. % saturates, and less than 10 wt. % aromatics, and has an aromatic performance ratio between 1.0 and 5.0. Also provided are lubricant formulations including the high viscosity high quality Group II lube base stock.
    Type: Application
    Filed: March 14, 2013
    Publication date: October 10, 2013
    Applicant: ExxonMobil Research and Engineering Company
    Inventors: Gretchen L. Holtzer, Ajit B. Dandekar, Charles L. Baker, Bradley R. Fingland, Bryan E. Hagee, Cathleen Yung, Frank C. Wang, Eugenio Sanchez, Rugved Prakash Pathare