Patents by Inventor Theodore F. Fisher

Theodore F. Fisher 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 for fluorine compound recovery using additive liquid
    Patent number: 5626023
    Abstract: A cryogenic system for the recovery of fluorine compounds from a carrier gas stream such as an effluent stream from a semiconductor facility comprising combining the carrier gas feed stream with additive liquid to keep fluorine compounds from solidifying and to reduce the vapor pressure of the fluorine compounds, followed by separation and recovery using a cryogenic rectification column system.
    Type: Grant
    Filed: February 16, 1995
    Date of Patent: May 6, 1997
    Assignee: Praxair Technology, Inc.
    Inventors: Theodore F. Fisher, Yijian Jin
  • Cryogenic rectification system for producing dual purity oxygen
    Patent number: 5546767
    Abstract: A cryogenic rectification system employing a double column and two auxiliary reboilers associated with one or two auxiliary columns wherein both lower purity oxygen and higher purity oxygen is produced.
    Type: Grant
    Filed: September 29, 1995
    Date of Patent: August 20, 1996
    Assignee: Praxair Technology, Inc.
    Inventors: James R. Dray, David R. Parsnick, Theodore F. Fisher, Michael W. Wisz
  • Cryogenic rectification system for fluorine compound recovery
    Patent number: 5502969
    Abstract: A cryogenic system for the recovery of fluorine compounds from a carrier gas stream such as an effluent stream from a semiconductor facility comprising a mass transfer contacting device, such as a cryogenic wash column, integrated with a cryogenic rectification column system.
    Type: Grant
    Filed: February 16, 1995
    Date of Patent: April 2, 1996
    Assignee: Praxair Technology, Inc.
    Inventors: Yijian Jin, Theodore F. Fisher
  • Cryogenic rectification system with dual heat pump
    Patent number: 5228297
    Abstract: A cryogenic air separation system wherein high pressure oxygen is transition-warmed against both transition-cooling feed air and transition-cooling nitrogen, supplying added reflux for the air separation and enabling column operation at higher pressures without degraded recovery.
    Type: Grant
    Filed: April 22, 1992
    Date of Patent: July 20, 1993
    Assignee: Praxair Technology, Inc.
    Inventors: Raymond R. Olson, Jr., Theodore F. Fisher
  • Argon purification system
    Patent number: 5106399
    Abstract: An argon purification system comprising an ambient temperature molecular sieve adsorption step, an ambient temperature chemisorption step, and a cryogenic temperature adsorption step, particularly useful with liquefaction of the purified argon.
    Type: Grant
    Filed: February 25, 1991
    Date of Patent: April 21, 1992
    Assignee: Union Carbide Industrial Gases Technology Corporation
    Inventor: Theodore F. Fisher
  • Process to recover hydrogen-free higher boiling synthesis gas component
    Patent number: 4805414
    Abstract: A process to recover higher boiling synthesis gas component substantially free of hydrogen comprising partial condensation of a synthesis gas reaction stream, defined stripping of hydrogen out of the resulting liquid, and fractional distillation of the resulting fluid.
    Type: Grant
    Filed: December 15, 1987
    Date of Patent: February 21, 1989
    Assignee: Union Carbide Corporation
    Inventor: Theodore F. Fisher
  • Process to produce high pressure methane gas
    Patent number: 4778498
    Abstract: A process to produce methane gas product with reduced product compression requirements comprising pumping liquid methane from a cryogenic nitrogen rejection plant to a high pressure thereby utilizing available excess refrigeration, and rewarming the pumped liquid methane product against incoming process streams.
    Type: Grant
    Filed: August 17, 1987
    Date of Patent: October 18, 1988
    Assignee: Union Carbide Corporation
    Inventors: Thomas C. Hanson, Theodore F. Fisher, Joseph A. Weber
  • Process to produce high pressure methane gas
    Patent number: 4710212
    Abstract: A process to produce methane gas product with reduced product compression requirements comprising pumping liquid methane from a cryogenic nitrogen rejection plant to a high pressure thereby utilizing available excess refrigeration, and rewarming the pumped liquid methane product against incoming process streams.
    Type: Grant
    Filed: September 24, 1986
    Date of Patent: December 1, 1987
    Assignee: Union Carbide Corporation
    Inventors: Thomas C. Hanson, Theodore F. Fisher, Joseph A. Weber
  • Process to produce cold helium gas for liquefaction
    Patent number: 4701201
    Abstract: A process to produce cold helium gas suitable for use as a feed to a helium liquifier comprising employing refrigeration from a nitrogen rejection unit to reduce the temperature of the helium gas just prior to its passage to the liquifier thus enabling a reduction in the liquifier energy requirement.
    Type: Grant
    Filed: September 24, 1986
    Date of Patent: October 20, 1987
    Assignee: Union Carbide Corporation
    Inventors: Thomas C. Hanson, Theodore F. Fisher, Joseph A. Weber, Ravindra F. Pahade
  • Process to produce helium gas
    Patent number: 4701200
    Abstract: A process to produce helium gas from a feed to a nitrogen rejection unit comprising employing refrigeration from the nitrogen rejection unit to increase the recovery of helium by cooling crude helium prior to further processing.
    Type: Grant
    Filed: September 24, 1986
    Date of Patent: October 20, 1987
    Assignee: Union Carbide Corporation
    Inventors: Theodore F. Fisher, Thomas C. Hanson, Joseph A. Weber
  • Acetylene removal in ethylene and hydrogen separation and recovery process
    Patent number: 4336045
    Abstract: A selected paraffinic or olefinic liquid is used to scrub acetylene from a minor gas fraction of uncondensed gas from a hydrocarbon feed mixture containing ethylene, hydrogen, acetylene and methane. Hydrogen product gas is separated and recovered from said minor gas fraction. The major gas fraction is processed without said acetylene removal operation, but under elevated pressure conditions effectively avoiding acetylene solidification during the separation and recovery of an ethylene-enriched liquid.
    Type: Grant
    Filed: June 29, 1981
    Date of Patent: June 22, 1982
    Assignee: Union Carbide Corporation
    Inventors: Theodore F. Fisher, John B. Saunders
  • Solid refuse disposal process
    Patent number: 4291636
    Abstract: Process for solid refuse disposal in which a vertical shaft furnace is maintained at 30-250 psia, part of the recycle-condensate is filtered to form liquid waste a portion of which is incinerated with a minor part of the product gas to form hot exhaust gas used to heat feed water in steam boiler zone, and energy from the resulting steam is recovered as part of the process energy requirement.
    Type: Grant
    Filed: May 29, 1980
    Date of Patent: September 29, 1981
    Assignee: Union Carbide Corporation
    Inventors: Victor E. Bergsten, Edward P. Eardley, Theodore F. Fisher