Patents by Inventor John H. Ziemer

John H. 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 rectification system with dual phase turboexpansion
    Patent number: 5564290
    Abstract: A cryogenic rectification system for producing elevated pressure gaseous oxygen wherein pressurized liquid oxygen is vaporized against pressurized working fluid which is then turboexpanded to form a dual phase stream having both vapor and liquid fractions.
    Type: Grant
    Filed: September 29, 1995
    Date of Patent: October 15, 1996
    Assignee: Praxair Technology, Inc.
    Inventors: Dante P. Bonaquist, John H. Ziemer, Cheryl A. Engels, James B. Wulf, Robert A. Beddome
  • Downflow plate and fin heat exchanger for cryogenic rectification
    Patent number: 5537840
    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 31, 1995
    Date of Patent: July 23, 1996
    Assignee: Praxair Technology, Inc.
    Inventors: Vijayaraghavan Srinivasan, Michael J. Lockett, John H. Ziemer
  • Downflow plate and fin heat exchanger for cryogenic rectification
    Patent number: 5438836
    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: August 5, 1994
    Date of Patent: August 8, 1995
    Assignee: Praxair Technology, Inc.
    Inventors: Vijayaraghavan Srinivasan, Michael J. Lockett, John H. Ziemer
  • Cryogenic rectification system with improved oxygen recovery
    Patent number: 5163296
    Abstract: A cryogenic rectification system wherein nitrogen top vapor of a higher pressure column reboils the column to provide additional vapor upflow and liquid downflow reflux for increased column drive and improved oxygen recovery.
    Type: Grant
    Filed: October 10, 1991
    Date of Patent: November 17, 1992
    Assignee: Praxair Technology, Inc.
    Inventors: John H. Ziemer, Ravindra F. Pahade
  • Air separation process with improved reboiler liquid cleaning circuit
    Patent number: 4957524
    Abstract: A cryogenic rectification method wherein liquid from a top condenser-reboiler is cleaned of higher boiling impurities by passage through an adsorbent bed and returned to the condenser-reboiler, wherein the flow back to the condenser-reboiler is driven by combination with density-reducing vapor.
    Type: Grant
    Filed: May 15, 1989
    Date of Patent: September 18, 1990
    Assignee: Union Carbide Corporation
    Inventors: Ravindra F. Pahade, John H. Ziemer, John K. Howell
  • Double column multiple condenser-reboiler high pressure nitrogen process
    Patent number: 4453957
    Abstract: A cryogenic process to efficiently produce large quantities of nitrogen gas at elevated pressure by use of a double column and multiple condenser-reboilers.
    Type: Grant
    Filed: December 2, 1982
    Date of Patent: June 12, 1984
    Assignee: Union Carbide Corporation
    Inventors: Ravindra F. Pahade, John H. Ziemer, Harry Cheung
  • Dual column high pressure nitrogen process
    Patent number: 4439220
    Abstract: A process to efficiently produce large quantities of elevated pressure nitrogen at a high recovery by the cryogenic separation of air employing two separate columns each of which is equipped with a top condenser and wherein the second column processes a feed stream obtained from the first column.
    Type: Grant
    Filed: December 2, 1982
    Date of Patent: March 27, 1984
    Assignee: Union Carbide Corporation
    Inventors: Walter J. Olszewski, Ravindra F. Pahade, John H. Ziemer
  • Air boiling process to produce low purity oxygen
    Patent number: 4410343
    Abstract: Low purity oxygen is produced by a process which employs a low pressure column and a medium pressure column, wherein the bottoms of the low pressure column are reboiled against condensing air and the resulting condensed air is fed into both the medium pressure and the low pressure column.
    Type: Grant
    Filed: December 24, 1981
    Date of Patent: October 18, 1983
    Assignee: Union Carbide Corporation
    Inventor: John H. Ziemer
  • Cryogenic system for producing low-purity oxygen
    Patent number: 4224045
    Abstract: Low-purity oxygen is produced by fractional distillation of liquefied air. A gas turbine, powered in part by waste nitrogen from the distillation, supplies energy to compress the feed air. Compressing the waste nitrogen prior to turbine expansion provides an increase in energy efficiency.
    Type: Grant
    Filed: August 23, 1978
    Date of Patent: September 23, 1980
    Assignee: Union Carbide Corporation
    Inventors: Walter J. Olszewski, John H. Ziemer