Patents by Inventor Dennis L. Holtermann

Dennis L. Holtermann 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).

  • Reforming naphtha with boron-containing large-pore zeolites
    Patent number: 5114565
    Abstract: Catalytic reforming processes using boron-containing large-pore zeolites.
    Type: Grant
    Filed: January 25, 1991
    Date of Patent: May 19, 1992
    Assignee: Chevron Research and Technology Company
    Inventors: Stacey I. Zones, Dennis L. Holtermann, Andrew Rainis
  • Isomerization catalyst and process for its use
    Patent number: 5082988
    Abstract: The present invention is a process and a catalyst for isomerizing normal and slightly branched C.sub.4 to C.sub.7 hydrocarbons. The catalyst comprises a Group VIII metal on Beta zeolite.
    Type: Grant
    Filed: July 6, 1989
    Date of Patent: January 21, 1992
    Assignee: Chevron Corporation
    Inventor: Dennis L. Holtermann
  • Zeolite SSZ-26
    Patent number: 5007997
    Abstract: A crystalline zeolite SSZ-26 is prepared using a hexamethyl [4.3.3.0] propellane-8,11-diammonium cation as a template. Also disclosed is a process for converting hydrocarbons with crystalline zeolite SSZ-26.
    Type: Grant
    Filed: December 20, 1989
    Date of Patent: April 16, 1991
    Assignee: Chevron Research Company
    Inventors: Stacy I. Zones, Donald S. Santilli, James Ziemer, Dennis L. Holtermann, Theresa A. Pecoraro, Robert A. Innes
  • Zeolite SSZ-26
    Patent number: 4910006
    Abstract: A crystalline zeolite SSZ-26 is prepared using a hexamethyl [4.3.3.0] propellane-8,11-diammonium cation as a template. Also disclosed is a process for converting hydrocarbons with crystalline zeolite SSZ-26.
    Type: Grant
    Filed: March 23, 1988
    Date of Patent: March 20, 1990
    Assignee: Chevron Research Company
    Inventors: Stacey I. Zones, Donald S. Santilli, James N. Ziemer, Dennis L. Holtermann, Theresa A. Pecoraro, Robert A. Innes