Patents by Inventor John F. Krumwiede

John F. Krumwiede 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).

  • Glass melting method using cullet as heat recovery and particulate collection medium
    Patent number: 4350512
    Abstract: In a glass melting operation, cullet is employed as a waste heat collector and/or particulate emissions collector. Cullet is contacted with exhaust gases in a gas/solid contact vessel wherein the cullet is heated and particulates are deposited onto the cullet. The heated cullet is preferably sent directly to the melting furnace. Electrostatic means may be employed to enhance particulate collection in the bed of cullet.
    Type: Grant
    Filed: March 31, 1981
    Date of Patent: September 21, 1982
    Assignee: PPG Industries, Inc.
    Inventor: John F. Krumwiede
  • Method of recovering waste heat from furnace flue gases using a granular heat exchange means
    Patent number: 4349367
    Abstract: Granular heat exchange medium is employed to recover waste heat from a combustion furnace, particularly a glass melting furnace, and the heated medium is then employed to pre-heat combustion air entering the furnace. A bed of granular heat exchange medium also may remove particulate emissions from the exhaust gas.
    Type: Grant
    Filed: March 31, 1981
    Date of Patent: September 14, 1982
    Assignee: PPG Industries, Inc.
    Inventor: John F. Krumwiede