Patents by Inventor John Harold Ziemer

John Harold Ziemer 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).

  • Cryogenic air separation system with dual section main heat exchanger
    Patent number: 6568209
    Abstract: A cryogenic air separation system having a main heat exchanger for processing feed air, said heat exchanger having a reversing heat exchanger function in an upward feed airflow countercurrent section and having a desuperheating function in a downward feed air flow cocurrent section.
    Type: Grant
    Filed: September 6, 2002
    Date of Patent: May 27, 2003
    Assignee: Praxair Technology, Inc.
    Inventors: John Harold Ziemer, Anthony J. Kurek, Jr.
  • Cryogenic rectification method for producing nitrogen gas and liquid nitrogen
    Patent number: 6125656
    Abstract: A cryogenic rectification method wherein both nitrogen gas and liquid are efficiently produced from air employing one or two columns wherein refrigeration to drive the cryogenic separation is provided by a, preferably closed loop, multicomponent refrigerant fluid refrigeration circuit.
    Type: Grant
    Filed: November 3, 1999
    Date of Patent: October 3, 2000
    Assignee: Praxair Technology, Inc.
    Inventors: Bayram Arman, Dante Patrick Bonaquist, Joseph Alfred Weber, John Harold Ziemer, Arun Acharya, Mohannad Abdul-Aziz Rashad
  • Downflow plate and fin heat exchanger for cryogenic rectification
    Patent number: 5724834
    Abstract: A downflow heat exchanger, particularly applicable as the main condenser/reboiler of a double column cryogenic air separation plant, wherein liquid distribution for uniform flow is carried out above the vapor passages and the well distributed liquid is passed into the liquid passages, preferably angularly onto the bridge fins, and then down through the liquid passages cocurrently with vapor in adjacent vapor passages.
    Type: Grant
    Filed: May 24, 1995
    Date of Patent: March 10, 1998
    Assignee: Praxair Technology, Inc.
    Inventors: Vijayaraghavan Srinivasan, Michael James Lockett, John Harold Ziemer