Patents by Inventor Hazel C. Olbrich

Hazel C. Olbrich 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 olefins at high pressure
    Patent number: 4502945
    Abstract: A highly efficient process for producing olefins using intermediate pore size zeolites is disclosed. The use of a specific range of silica:alumina mole ratios (175:1 to about 300:1) at pressure over 30 psia has been found to decrease catalyst deactivation rates for these intermediate pore size catalysts.
    Type: Grant
    Filed: June 9, 1982
    Date of Patent: March 5, 1985
    Assignee: Chevron Research Company
    Inventors: Hazel C. Olbrich, Dennis J. O'Rear
  • Process for dewaxing and desulfurizing oils
    Patent number: 4436614
    Abstract: A desulfurizing and dewaxing process which can be performed in a single reaction vessel is disclosed.The desired lowering of oil partial pressure for dewaxing zone is accomplished by adding diluent gas to the HDS-zone effluent, thus obviating the need for other means to maintain differing oil partial pressures between serial catalyst zones.
    Type: Grant
    Filed: October 8, 1982
    Date of Patent: March 13, 1984
    Assignee: Chevron Research Company
    Inventors: Hazel C. Olbrich, Dennis J. O'Rear, John A. Zakarian