Patents by Inventor Catherine Berkebile, Administratrix

Catherine Berkebile, Administratrix 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).

  • Processes for the manufacture of enriched pitches and carbon fibers
    Patent number: 5316654
    Abstract: There are provided improved processes for the manufacture of enriched pitches, carbon fiber precursors, carbon fibers, and graphite fibers. The improvement comprises employing an elevated wiped-film evaporator in a wiped-film evaporator system comprising the wiped-film evaporator and a means for recovering enriched pitch, such as a positive displacement pump, to form an enriched pitch from catalytic pitch and regulating the operating conditions of the wiped-film evaporator system to provide the desired enriched pitch. The wiped-film evaporator is located a specific distance above the means for recovering enriched pitch. The vertical distance between the outlet of the wiped-film evaporator and the inlet of the means for recovering enriched pitch is within the range of about 10 feet to about 40 feet, preferably about 20 feet to about 40 feet.
    Type: Grant
    Filed: September 13, 1985
    Date of Patent: May 31, 1994
    Inventors: Donald C. Berkebile, deceased, Catherine Berkebile, Administratrix, Donald M. Lee, Larry D. Veneziano, Joseph J. Lauer, Roy E. Booth, William P. Hettinger, Willard Jones