Patents by Inventor Mohammad Abdul-Aziz Rashad

Mohammad Abdul-Aziz Rashad 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).

  • Liquid natural gas liquefier utilizing mechanical and liquid nitrogen refrigeration
    Patent number: 11402151
    Abstract: The present invention relates to a method and system for producing liquefied natural gas (LNG) from a stream of pressurized natural gas which involves a combination of mechanical refrigeration.
    Type: Grant
    Filed: February 23, 2018
    Date of Patent: August 2, 2022
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Nick J Degenstein, James R Handley, Mohammad Abdul-Aziz Rashad
  • LIQUID NATURAL GAS LIQUEFIER UTILIZING MECHANICAL AND LIQUID NITROGEN REFRIGERATION
    Publication number: 20180292128
    Abstract: The present invention relates to a method and system for producing liquefied natural gas (LNG) from a stream of pressurized natural gas which involves a combination of mechanical refrigeration.
    Type: Application
    Filed: February 23, 2018
    Publication date: October 11, 2018
    Inventors: Nick J. Degenstein, James R. Handley, Mohammad Abdul-Aziz Rashad
  • METHOD FOR CONTROLLING A RECYCLE GAS STREAM UTILIZING AN EJECTOR FOR THE COOLING OF A UNIT OPERATION
    Publication number: 20180172322
    Abstract: The present invention relates to a method of preparing a gas coolant for the direct cooling of a unit operation under a fixed heat load from its normal operating temperature (e.g., 300° F. and above) to a lower temperature (e.g., below 100° F.) in order to allow for maintenance or other non-routine work to be carried out in said unit operation.
    Type: Application
    Filed: December 19, 2016
    Publication date: June 21, 2018
    Inventors: William J. Scharmach, Richard M. Kelly, Mohammad Abdul-Aziz Rashad, Yi Ma Lenhert, Matthew Thomas
  • 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
  • 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 industrial gas refrigeration system
    Patent number: 6427483
    Abstract: A method and apparatus for refrigerating and, if desired, liquefying an industrial gas wherein a multicomponent refrigerant fluid is used to generate refrigeration in a single circuit which includes a single phase separation and recycle after an initial heat exchange stage.
    Type: Grant
    Filed: November 9, 2001
    Date of Patent: August 6, 2002
    Assignee: Praxair Technology, Inc.
    Inventors: Mohammad Abdul-Aziz Rashad, Bayram Arman, Arun Acharya
  • Method for providing refrigeration
    Patent number: 6176102
    Abstract: A method for providing refrigeration such as to an insulated enclosure wherein a defined multicomponent refrigerant fluid undergoes a phase change coupled with Joule-Thomson expansion to generate refrigeration over a wide temperature range which may comprise from ambient to low temperatures.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: January 23, 2001
    Assignee: Praxair Technology, Inc.
    Inventors: Richard A. Novak, Gary D. Lang, Arun Acharya, John Henri Royal, Mohammad Abdul-Aziz Rashad
  • 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