Patents by Inventor Steven D. Bridges

Steven D. Bridges 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).

  • Dehydrogenation process control
    Patent number: 5243122
    Abstract: In a steam active catalytic process employing a fixed catalyst bed for the dehydrogenation of alkanes to alkenes wherein reaction temperatures above about 500.degree. C. (932.degree. F.) must be maintained for commercially feasible conversions, the decline in catalyst activity druing a production period is slowed by maintaining a substantially constant temperature for the reaction effluent while allowing the average temperature of the fixed catalyst bed to rise during a production period.
    Type: Grant
    Filed: December 30, 1991
    Date of Patent: September 7, 1993
    Assignee: Phillips Petroleum Company
    Inventors: Francis M. Brinkmeyer, Kelly B. Savage, Steven D. Bridges
  • Purification of cis-olefins
    Patent number: 4940831
    Abstract: A method for purifying a cis-olefin formed by alkylating a sulfonate ester comprising mixing the reaction formed by alkylating a sulfonate ester with an acid solution, separating said acid solution, and mixing the resultant purification product with a C.sub.1 -C.sub.4 alcohol and optionally a base followed by separation and distillation, or passing said reaction mixture through a silica gel and collecting the cis-olefin fraction.
    Type: Grant
    Filed: February 15, 1989
    Date of Patent: July 10, 1990
    Assignee: Phillips Petroleum Company
    Inventors: Charles A. Drake, Jim D. Byers, Steven D. Bridges