Patents by Inventor Barry A. Friedfeld

Barry A. Friedfeld 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).

  • Process for cleaning the interiors of vessels
    Patent number: 4357175
    Abstract: An environmentally acceptable method for cleaning the interior of vessels comprises contacting the interior of a vessel with a solvent for the contaminant contained therein to produce a contaminated solvent, collecting the contaminated solvent from the vessel, separating essentially all of the contaminant from the contaminated solvent to recover essentially all of the solvent essentially free of the contaminant and produce a contaminant composition which is incineratable or can be made incineratable by blending with a combustible composition, such as fuel oil.The contaminant may be separated from the contaminated solvent by distillation; in which case the overhead product may be washed with sulfuric acid and then neutralized with a base.
    Type: Grant
    Filed: July 8, 1981
    Date of Patent: November 2, 1982
    Assignee: Stauffer Chemical Company
    Inventors: Chester G. Buffington, Herbert H. Fang, Barry A. Friedfeld, Thaddeus J. Kaniecki, John W. Kennedy, Chong-tan Liu, Morton Sternberg, Henry H. Feng, Paul Y. Chen, Waheed Mukaddam, Pattamadai E. Narasimhan