Patents by Inventor Steven L. Keiner

Steven L. Keiner 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).

  • Vent orifice in fluid catalytic cracking direct-connected cyclone apparatus
    Patent number: 5417932
    Abstract: A wear resistant vent orifice is formed by a ring plate member, having erosion protective material at least on the inner annulus thereof, defining the vent orifice between the inner annulus of the ring plate and a tube member passing therethrough.
    Type: Grant
    Filed: June 21, 1993
    Date of Patent: May 23, 1995
    Assignee: Texaco Inc.
    Inventors: Leonce F. Castagnos, Jr., Gary E. Collier, Steven L. Keiner