Patents by Inventor Mary E. Callaghan

Mary E. Callaghan 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).

  • Treatment of desulfurization catalyst and its use
    Patent number: 4098721
    Abstract: A desulfurization catalyst is activated by being heated to a temperature between about 750.degree. and 850.degree. F. in the presence of the charge stock to be desulfurized during the initial stages of the on-stream period. In a preferred embodiment the catalyst, prior to the heat treatment, is sulfided at a low temperature and low pressure. The resulting catalyst effectively desulfurizes a petroleum hydrocarbon charge stock with reduced hydrogen consumption.
    Type: Grant
    Filed: November 3, 1975
    Date of Patent: July 4, 1978
    Assignee: Texaco Inc.
    Inventors: Charles A. Ganster, Mary E. Callaghan, Lee K. Gilmer, Gerald V. Nelson, Kenneth D. Miller
  • Method of hydrodesulfurizing heavy petroleum fraction in the initial stage of the on-stream period
    Patent number: 3953321
    Abstract: A desulfurization catalyst is activated by being heated to a temperature between about 750.degree. and 850.degree.F. in the presence of the charge stock to be desulfurized during the initial stages of the on-stream period. In a preferred embodiment the catalyst, prior to the heat treatment, is sulfided at a low temperature and low pressure. The resulting catalyst effectively desulfurizes a petroleum hydrocarbon charge stock with reduced hydrogen consumption.
    Type: Grant
    Filed: December 27, 1974
    Date of Patent: April 27, 1976
    Assignee: Texaco Inc.
    Inventors: Charles A. Ganster, Mary E. Callaghan, Lee K. Gilmer, Gerald V. Nelson, Kenneth D. Miller