Patents by Inventor David W. Parham

David W. Parham 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).

  • Publication number: 20130109768
    Abstract: Processes and systems are provided for converting synthesis gas containing a mixture of H2 and CO to liquid hydrocarbon products having a cloud point less than about 15° C. The systems utilize at least one Fischer-Tropsch reactor containing hybrid Fischer-Tropsch catalyst with cooling and separation of reactor effluent following each reactor. The low cloud point indicates that the amount of wax in the hydrocarbon products is minimized relative to conventional Fischer-Tropsch conversion. Accordingly, more economical systems can be built and operated because equipment associated with wax removal or wax treatment can be reduced or eliminated.
    Type: Application
    Filed: October 31, 2011
    Publication date: May 2, 2013
    Applicant: Chevron U.S.A. Inc.
    Inventors: Robert J. Saxton, Gordon R. Deppe, Scott Oliver, David W. Parham, Kandaswamy Jothimurugesan, Charles L. Kibby, Tapan K. Das, Christine M. Philips, Richard Sasson, Anne Helgeson
  • Patent number: 6186882
    Abstract: An animal gambrel apparatus having a three piece telescoping spreader bar. The center section of the spreader bar has a telescoping section engaged in each end of the center section, and each end of the center section has an internally mounted retention member that cooperates with an externally mounted stop member on the proximal end of each telescoping section to prevent the telescoping sections from being dislodged from the center section. A locking mechanism is attached to the proximal end of one of the telescoping sections to bias and selectively lock and maintain the sections of the spreader bar in an extended condition. The extended condition is released by turning the spreader bar upside down to disengage the locking mechanism.
    Type: Grant
    Filed: December 13, 1999
    Date of Patent: February 13, 2001
    Inventors: Terry G. Adams, David W. Parham