Patents by Inventor John Pargeter

John Pargeter 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 and system for recovering zinc and other metal vapors from a gaseous stream
    Patent number: 5258055
    Abstract: A process is provided for condensing zinc and other metal vapors from a gaseous stream. A duplex condensing bath is provided, having a bottom layer of molten zinc and a top layer comprising a liquid condensing medium, such as a molten salt. The molten salt is inert to, immiscible with, and less dense than the molten zinc, and has a negligible zinc vapor pressure even at temperatures greater than 700.degree. C. The molten salt condensing medium is splashed into, or otherwise contacted with the gaseous stream, causing condensation of the zinc and other metal vapors, which then partition with the molten zinc layer of the duplex condensing bath.The process of the present invention is a significant improvement over current molten zinc-type splash condenser systems. The negligible zinc vapor pressure of the molten salt layer permits operating temperatures of 700.degree. C.
    Type: Grant
    Filed: August 31, 1992
    Date of Patent: November 2, 1993
    Assignee: International Mill Service, Inc.
    Inventors: John Pargeter, David T. Bunney