Patents by Inventor Susan M. Leiby

Susan M. Leiby 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 making improved lubricating oils from heavy feedstock
    Patent number: 4711710
    Abstract: There is disclosed an improved dewaxing process which will operate for longer periods of time involving contacting a feedstock having a 50 volume percent boiling point greater than 900.degree. F. with a crystalline aluminosilicate zeolite having a Constraint Index of from 1 to 12 and a silica-to-alumina ratio of at least 12. The crystalline aluminosilicate zeolite is composited with an inorganic oxide, such as alumina. The composite also containing a hydrogenation metal and the catalyst composite has a maximum diffusion distance of less than 0.025 inch.
    Type: Grant
    Filed: December 5, 1986
    Date of Patent: December 8, 1987
    Assignee: Mobil Oil Corporation
    Inventors: Nai Y. Chen, Thomas F. Degnan, Jr., Susan M. Leiby, Stephen M. Oleck, Bruce P. Pelrine