Patents Examined by Lillie Richardson
  • Separation of true asphaltenes from microcrystalline waxes
    Patent number: 4155833
    Abstract: A more efficient separation of the asphaltenes from microcrystalline waxes in the bottoms from crude oil distillation is accomplished by using a natural gasoline fraction, boiling in the range of from 200.degree.-400.degree. F., as a solvent extraction agent and then effecting a centrifugal separation at elevated temperatures and pressures. The resulting separated asphaltenes will have far less microcrystalline wax content than the heretofore used procedures which involved the settling out of the asphaltenes in huge settling tanks.
    Type: Grant
    Filed: January 30, 1978
    Date of Patent: May 22, 1979
    Assignee: Energy Modification, Inc.
    Inventor: William K. T. Gleim
  • Method of applying a protective coating to a body
    Patent number: 3978253
    Abstract: A protective coating is applied to a eutectic or near-eutectic alloy which contains at least one continuously multi-ply connected crystalline phase and at least one other phase which may be continuous or non-continuous, by removing from the surface of said alloy, one or more of the phases, such that at least one continuous phase will remain unaffected, so as to roughen said alloy surface, and thereafter coating said surface with a protective coating.
    Type: Grant
    Filed: March 16, 1972
    Date of Patent: August 31, 1976
    Assignee: Brown, Boveri & Company Limited
    Inventor: Peter Sahm