Patents by Inventor Dante Patrick Bonaquist

Dante Patrick Bonaquist 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).

  • Multicomponent refrigeration fluid refrigeration system with auxiliary ammonia cascade circuit
    Patent number: 6494054
    Abstract: A refrigeration system wherein an ammonia refrigerant fluid in a cascade refrigeration circuit provides auxiliary refrigeration to a multicomponent refrigerant fluid which passes from an autorefrigerator to provide refrigeration to a heat load.
    Type: Grant
    Filed: August 16, 2001
    Date of Patent: December 17, 2002
    Assignee: Praxair Technology, Inc.
    Inventors: Kenneth Kai Wong, Boris Yudin, Dante Patrick Bonaquist, Mohammad Abdul-Aziz Rashad
  • Cryogenic system for producing high purity argon
    Publication number: 20020174680
    Abstract: A system for purifying and reclaiming argon from an industrial process wherein oxygen is removed by hydrogenation and dehydration, and nitrogen and hydrogen are removed by cryogenic separation.
    Type: Application
    Filed: May 22, 2001
    Publication date: November 28, 2002
    Inventors: Kenneth Kai Wong, Dante Patrick Bonaquist
  • Integrated heat exchanger system for producing carbon dioxide
    Patent number: 6477859
    Abstract: A system for producing carbon dioxide wherein carbon dioxide feed fluid is first processed in a cooling section of an integrated heat exchanger before purification in a column, and wherein column bottom fluid operates within one of an evaporating section and desuperheating section of the heat exchanger and refrigerant fluid operates within the other of the evaporating section and desuperheating section of the heat exchanger.
    Type: Grant
    Filed: December 4, 2001
    Date of Patent: November 12, 2002
    Assignee: Praxair Technology, Inc.
    Inventors: Kenneth Kai Wong, Dante Patrick Bonaquist, Henry Edward Howard
  • Thermo-siphon method for providing refrigeration to a refrigeration load
    Patent number: 6477847
    Abstract: A method wherein refrigeration is generated, preferably using a pulse tube cryocooler or refrigerator, to produce cold working gas which is used to liquefy coupling fluid circulating between a coupling fluid liquid reservoir and a refrigeration load, such as superconductivity equipment, using thermo-siphon effects.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: November 12, 2002
    Assignee: Praxair Technology, Inc.
    Inventors: Dante Patrick Bonaquist, John Fredric Billingham, Jalal Zia, Nancy Jean Lynch, Bayram Arman
  • Method of purifying and recycling argon
    Publication number: 20020141925
    Abstract: This invention is directed to a method for purifying argon from an impure argon stream. If the oxygen concentration in the impure argon is less than about 10 mole percent of oxygen, the invention is proceeded in the sequential steps of a) removing chlorine from the impure argon stream; b) adding hydrogen to the impure argon stream; c) removing carbon dioxide and water from the impure argon stream; d) removing hydrogen from the impure argon stream; and e) removing nitrogen from the impure argon stream to form a purified argon stream.
    Type: Application
    Filed: March 1, 2001
    Publication date: October 3, 2002
    Inventors: Kenneth K. Wong, Dante Patrick Bonaquist
  • Method for providing refrigeration using a turboexpander cycle
    Patent number: 6438994
    Abstract: A method for generating refrigeration using a turboexpander or reverse Brayton cycle which can more efficiently generate refrigeration especially to cryogenic temperatures using a defined refrigerant mixture containing argon and/or nitrogen.
    Type: Grant
    Filed: September 27, 2001
    Date of Patent: August 27, 2002
    Assignee: Praxair Technology, Inc.
    Inventors: Mohammad Abdul-Aziz Rashad, Kenneth Kai Wong, Henry Edward Howard, Dante Patrick Bonaquist, Bayram Arman
  • Cryogenic refrigeration system
    Patent number: 6425264
    Abstract: A cryogenic refrigeration system wherein refrigeration is provided to a heat load by a warming multicomponent refrigerant fluid recirculating in a refrigeration circuit and by cryogenic liquid separately provided to the heat load in direct or indirect heat exchange with the heat load.
    Type: Grant
    Filed: August 16, 2001
    Date of Patent: July 30, 2002
    Assignee: Praxair Technology, Inc.
    Inventors: Kenneth Kai Wong, Richard A. Novak, Michael John Sinicropi, Dante Patrick Bonaquist
  • 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 refrigeration system using magnetic refrigerator forecooling
    Patent number: 6415611
    Abstract: A system for providing refrigeration to a heat load, especially over a larger temperature range and at a cryogenic temperature, wherein magnetic refrigeration cools a heat transfer medium to provide higher level refrigeration to a refrigeration fluid, and lower level refrigeration is provided to the fluid using a nonmagnetic system.
    Type: Grant
    Filed: February 22, 2001
    Date of Patent: July 9, 2002
    Assignee: Praxair Technology, Inc.
    Inventors: Arun Acharya, Bayram Arman, Dante Patrick Bonaquist
  • Gas separation process using ceramic membrane and regenerators
    Patent number: 6406518
    Abstract: A process (and corresponding system) for separating a high purity gas (e.g. oxygen) from a feed gas stream (e.g. air) that includes heating the feed gas stream before passing the heated feed gas stream through a ceramic membrane to separate a gas component from the other components of the gas stream.
    Type: Grant
    Filed: August 21, 2000
    Date of Patent: June 18, 2002
    Assignee: Praxair Technology, Inc.
    Inventors: Dante Patrick Bonaquist, John Fredric Billingham, Joseph Michael Schwartz, Ravi Prasad
  • Integrated heat exchanger system for producing carbon dioxide
    Publication number: 20020059807
    Abstract: A system for producing carbon dioxide wherein carbon dioxide feed fluid is first processed in a cooling section of an integrated heat exchanger before purification in a column, and wherein column bottom fluid operates within one of an evaporating section and desuperheating section of the heat exchanger and refrigerant fluid operates within the other of the evaporating section and desuperheating section of the heat exchanger.
    Type: Application
    Filed: December 4, 2001
    Publication date: May 23, 2002
    Inventors: Kenneth Kai Wong, Dante Patrick Bonaquist, Henry Edward Howard
  • Cryogenic pulse tube system
    Patent number: 6374617
    Abstract: A pulse tube system especially useful for producing and delivering refrigeration at very cold temperatures wherein a product fluid such as hydrogen is preferably precooled and then liquefied, subcooled and/or densified by heat exchange with ultra cold gas generated by a pulsing compression wave which rejects heat into a cryogen fluid heat sink.
    Type: Grant
    Filed: January 19, 2001
    Date of Patent: April 23, 2002
    Assignee: Praxair Technology, Inc.
    Inventors: Dante Patrick Bonaquist, Bayram Arman, Nancy Jean Lynch, Arun Acharya
  • Cryogenic air separation system with integrated booster and multicomponent refrigeration compression
    Patent number: 6357258
    Abstract: A cryogenic air separation system wherein pressure energy is supplied by a bridge machine having one or more booster compressors and a multicomponent refrigerant fluid compressor of a multicomponent refrigerant fluid circuit, all of the compressors of the bridge machine driven by power supplied through a single gear case.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: March 19, 2002
    Assignee: Praxair Technology, Inc.
    Inventors: Kevin William Mahoney, Dante Patrick Bonaquist
  • Cryogenic nitrogen production system using a single brazement
    Patent number: 6351969
    Abstract: A cryogenic nitrogen production plant wherein all the heat transfer steps, and preferably all the heat transfer and separation steps, are carried out in a brazement which receives feed air and from which is recovered product nitrogen.
    Type: Grant
    Filed: January 31, 2001
    Date of Patent: March 5, 2002
    Assignee: Praxair Technology, Inc.
    Inventors: Bayram Arman, Dante Patrick Bonaquist, Tu Cam Nguyen
  • System for operating cryogenic liquid tankage
    Patent number: 6336331
    Abstract: A system wherein flashoff losses from cryogenic liquid tankage are reduced wherein fluid from the tankage is condensed and subcooled against refrigeration bearing refrigerant fluid generated by an exogenous refrigeration system.
    Type: Grant
    Filed: August 1, 2000
    Date of Patent: January 8, 2002
    Assignee: Praxair Technology, Inc.
    Inventors: Norman Henry White, Kenneth Kai Wong, William Martin Greene, III, Dante Patrick Bonaquist, Arun Acharya, Bayram Arman
  • Compression system for cryogenic refrigeration with multicomponent refrigerant
    Patent number: 6330811
    Abstract: A system for generating refrigeration wherein a multicomponent refrigerant is compressed in a compressor lubricated with polyalphaolefin-based oil, the oil is removed from the compressed refrigerant, and the compressed refrigerant is expanded to generate refrigeration at a cryogenic temperature for provision to a refrigeration receptor.
    Type: Grant
    Filed: June 29, 2000
    Date of Patent: December 18, 2001
    Assignee: Praxair Technology, Inc.
    Inventors: Bayram Arman, Dante Patrick Bonaquist
  • Refrigeration system with coupling fluid stabilizing circuit
    Patent number: 6327865
    Abstract: A refrigeration system wherein refrigeration is generated at a relatively steady output by a refrigeration circuit and passed into a coupling fluid for transfer to a refrigeration load using a coupling fluid stabilizing circuit having a stabilizing reservoir.
    Type: Grant
    Filed: August 25, 2000
    Date of Patent: December 11, 2001
    Assignee: Praxair Technology, Inc.
    Inventors: Dante Patrick Bonaquist, Kenneth Kai Wong, Richard Amory Victor, Bayram Arman
  • Method for generating a cold gas
    Publication number: 20010035026
    Abstract: A method for generating refrigeration for application to a heat load, especially at very cold temperatures, using an environmentally benign working gas such as air and using an upstream precooling circuit to reduce or eliminate inefficiencies stemming from warm end pinch.
    Type: Application
    Filed: March 21, 2001
    Publication date: November 1, 2001
    Inventors: Dante Patrick Bonaquist, Harry Cheung, Arun Acharya
  • Cryogenic air separation system with integrated mass and heat transfer
    Publication number: 20010029751
    Abstract: A cryogenic air separation system comprising an integrated core and typically including a double column wherein incoming feed air is cooled in the core which also processes a stream from the double column. A separating section of the core processes a stream from the double column to form product.
    Type: Application
    Filed: March 20, 2001
    Publication date: October 18, 2001
    Inventors: Tu Cam Nguyen, Bayram Arman, Dante Patrick Bonaquist, Kenneth Kai Wong, John Fredric Billingham
  • Method for generating a cold gas
    Patent number: 6301923
    Abstract: A method for generating refrigeration for application to a heat load, especially at very cold temperatures, using an environmentally benign working gas such as air and using an upstream precooling circuit to reduce or eliminate inefficiencies stemming from warm end pinch.
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: October 16, 2001
    Assignee: Praxair Technology, Inc.
    Inventors: Dante Patrick Bonaquist, Harry Cheung, Arun Acharya