Patents by Inventor Walter Joseph Olszewski

Walter Joseph Olszewski 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).

  • Variable load refrigeration system particularly for cryogenic temperatures
    Patent number: 6426019
    Abstract: A method for generating refrigeration, especially over a wide temperature range including cryogenic temperatures, wherein a non-toxic, non-flammable and low or non-ozone-depleting mixture is formed from defined components and maintained in variable load form through compression, cooling, expansion and warming steps in a refrigeration cycle.
    Type: Grant
    Filed: April 7, 2000
    Date of Patent: July 30, 2002
    Assignee: Praxair Technology, Inc.
    Inventors: Arun Acharya, Bayram Arman, Walter Joseph Olszewski, Dante Patrick Bonaquist, Joseph Alfred Weber
  • Cryogenic indirect oxygen compression system
    Patent number: 6178776
    Abstract: A system for producing pressurized oxygen gas from low pressure oxygen gas without the need for engaging an oxygen compressor wherein low pressure oxygen gas is condensed by indirect heat exchange with a multicomponent refrigerant fluid, passed through a liquid pump, and then vaporized against that same multicomponent refrigerant fluid.
    Type: Grant
    Filed: October 29, 1999
    Date of Patent: January 30, 2001
    Assignee: Praxair Technology, Inc.
    Inventors: Kevin William Mahoney, Dante Patrick Bonaquist, Walter Joseph Olszewski
  • Cryogenic rectification system and hybrid refrigeration generation
    Patent number: 6112550
    Abstract: A system for generating refrigeration and providing the refrigeration into a cryogenic rectification plant wherein, in addition to refrigeration generated by turboexpansion, further refrigeration for the plant is generated by a recirculating multicomponent refrigerant in a refrigeration circuit.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: September 5, 2000
    Assignee: Praxair Technology, Inc.
    Inventors: Dante Patrick Bonaquist, Bayram Arman, Joseph Alfred Weber, Walter Joseph Olszewski, Mark Edward Vincett
  • Variable load refrigeration system particularly for cryogenic temperatures
    Patent number: 6076372
    Abstract: A method for generating refrigeration, especially over a wide temperature range including cryogenic temperatures, wherein a non-toxic, non-flammable and low or non-ozone-depleting mixture is formed from defined components and maintained in variable load form through compression, cooling, expansion and warming steps in a refrigeration cycle.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: June 20, 2000
    Assignee: Praxair Technology, Inc.
    Inventors: Arun Acharya, Bayram Arman, Walter Joseph Olszewski, Dante Patrick Bonaquist, Joseph Alfred Weber
  • Multicomponent refrigerant cooling with internal recycle
    Patent number: 6065305
    Abstract: A system for cooling a fluid particularly to a cryogenic temperature wherein a multicomponent refrigerant fluid is partially condensed, the liquid used to generate refrigeration to cool the product by recycle into an upstream portion of the warming leg of the refrigeration circuit, and the vapor, having a different composition than the liquid, is used to generate refrigeration at a colder temperature for further cooling of the product.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: May 23, 2000
    Assignee: Praxair Technology, Inc.
    Inventors: Bayram Arman, Walter Joseph Olszewski, Joseph Alfred Weber, Dante Patrick Bonaquist, Arun Acharya, John Henri Royal
  • Single circuit cryogenic liquefaction of industrial gas
    Patent number: 6041621
    Abstract: A method for more efficiently liquefying industrial gas wherein refrigeration for the liquefaction is generated using a defined multicomponent refrigerant fluid and provided by a single flow circuit over a wide temperature range from ambient to cryogenic temperature.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: March 28, 2000
    Assignee: Praxair Technology, Inc.
    Inventors: Walter Joseph Olszewski, Bayram Arman, Joseph Alfred Weber, Arun Acharya
  • Cryogenic industrial gas liquefaction with hybrid refrigeration generation
    Patent number: 6041620
    Abstract: A method for liquefying an industrial gas wherein a portion of the requisite refrigeration is generated by a multicomponent refrigerant circuit and a portion is generated by turboexpansion of either a portion of the industrial gas or a portion of the multicomponent refrigerant.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: March 28, 2000
    Assignee: Praxair Technology, Inc.
    Inventors: Walter Joseph Olszewski, Bayram Arman, Arun Acharya, Joseph Alfred Weber, Mohammad Abdul-Aziz Rashad
  • Cryogenic air separation system for feed air flow disturbances
    Patent number: 5950455
    Abstract: A cryogenic air separation system wherein separation inefficiencies resulting from feed air flow disturbances due to discontinuous prepurifier operation are reduced or eliminated by inhibiting column liquid drainage during such disturbances using mesh packing having interspacial regions which hold up the liquid during the disturbances using surface tension.
    Type: Grant
    Filed: April 1, 1998
    Date of Patent: September 14, 1999
    Assignee: Praxair Technology, Inc.
    Inventors: John Fredric Billingham, Walter Joseph Olszewski, John Peter Ricotta