Patents by Inventor Douglas Oakey
Douglas Oakey 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).
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Patent number: 11214200Abstract: A primary support has an upper surface, a lower surface, an outer surface, and an inner surface. The upper and inner surfaces form an arcuate upper-inner corner. The upper and outer surfaces form an arcuate upper-outer corner. The lower and outer surfaces form an arcuate lower-outer corner. The primary support is extruded of a polymeric material. A decorative panel has an upper region positioned over the upper surface of the primary support with an inner end terminating adjacent to the upper-inner corner. The decorative panel has an outer region positioned over the outer surface of the primary support with a lower end terminating adjacent to the lower-outer corner. The decorative panel has an intermediate region formed arcuately and positioned over the upper-outer corner. The decorative panel is fabricated of a rigid, shiny material.Type: GrantFiled: November 5, 2019Date of Patent: January 4, 2022Inventor: Douglas Oakey
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Patent number: 9937865Abstract: An upper component has a top and an inner side with a lower free end and has an outer side with a lower free end. A lower component has a bottom and an inner side with an upper free end and has an outer side with an upper free end. The lower free ends are coupled to the upper free ends respectively forming a cylindrical configuration with a chamber there within. A support beam within the chamber extends vertically with an upper end adjacent to the top and a lower end adjacent to the bottom.Type: GrantFiled: June 9, 2017Date of Patent: April 10, 2018Inventor: Douglas Oakey
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Patent number: 7677003Abstract: A shutter having a unitary frame formed by four perimeter rails, each having a receptacle at each of its distal ends, with four connection members, each having structure inserted into and secured within one receptacle of each of two of the perimeter rails. Optionally, a latch pin is movable through a guide hole formed in one of the corner connection members. A further option is louvers extending through a center support.Type: GrantFiled: March 11, 2004Date of Patent: March 16, 2010Inventors: Antony L. Baughn, Timothy S. Baughn, Douglas Oakey
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Patent number: 7127915Abstract: Nitrogen is rejected from a pressurised feed gas stream comprising methane and nitrogen by cooling the feed gas stream in a main heat exchanger 10 and rectifying the cooled feed gas stream in a double rectification column 20 comprising a higher pressure rectification column 22, a lower pressure rectification column 24, and a condenser-reboiler 25 placing the higher pressure column 22 in heat exchange relationship with the lower pressure column 24. A pump 50 withdraws a methane product stream from the column 24. The methane product stream is pressurised by the pump 50 and is vaporised in the main heat exchanger 10. The pressurised feed gas stream is expanded with the performance of external work in an expansion turbine 6 upstream of the main heat exchanger 10.Type: GrantFiled: September 3, 2003Date of Patent: October 31, 2006Assignee: The BOC Group plcInventors: Stephen Roger Clare, John Douglas Oakey
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Patent number: 7059152Abstract: Nitrogen is rejected from a feed natural gas stream comprising methane and nitrogen so as to form a primary methane product. The mole fraction of nitrogen in the feed natural gas increases over a period of time. The feed natural gas stream is cooled in a main heat exchanger and is rectified in a double rectification column. A primary product methane stream and a secondary nitrogen-enriched product stream are withdrawn from the rectification column. The secondary nitrogen-enriched product stream has a mole fraction of methane at or above a chosen minimum value when the said mole fraction of nitrogen is at a minimum. When the said mole fraction of nitrogen rises to a value at which the mole fraction of methane in the secondary nitrogen-enriched product stream falls below the chosen minimum, a part of the feed gas is introduced through conduit into the secondary nitrogen-enriched product stream so as to restore its mole fraction of methane to the chosen minimum value or a value thereabove.Type: GrantFiled: November 5, 2003Date of Patent: June 13, 2006Assignee: The BOC Group plcInventors: John Douglas Oakey, Brian Morice Davies
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Publication number: 20050210777Abstract: A shutter having a unitary frame formed by four perimeter rails, each having a receptacle at each of its distal ends, with four connection members, each having structure inserted into and secured within one receptacle of each of two of the perimeter rails. Optionally, a latch pin is movable through a guide hole formed in one of the corner connection members. A further option is louvers extending through a center support.Type: ApplicationFiled: March 11, 2004Publication date: September 29, 2005Inventors: Antony Baughn, Timothy Baughn, Douglas Oakey
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Patent number: 6837071Abstract: Nitrogen is rejected from a feed gas stream comprising methane and nitrogen so as to form a methane product. The feed gas is separated in a double rectification column comprising a higher pressure rectification column 14, a lower pressure rectification column 16, and a condenser-reboiler 18. Product methane is withdrawn from the column 16 by a pump 42 and is vaporised. A flow of gas is recycled from the column 16 to the column 14, being warmed in main heat exchanger 4. A first part of the warmed recycle gas being compressed in compressor 48 to a first pressure and introduced into the higher pressure rectification column 14. A second part of the warmed recycle gas is compressed in the compressor 48 and condensed in a second condenser-reboiler associated with an intermediate main exchange region of the lower pressure column 16 and is returned to the higher pressure rectification column 14.Type: GrantFiled: July 1, 2003Date of Patent: January 4, 2005Assignee: The BOC Group plcInventor: John Douglas Oakey
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Publication number: 20040182109Abstract: Nitrogen is rejected from a feed natural gas stream comprising methane and nitrogen so as to form a primary methane product. The mole fraction of nitrogen in the feed natural gas increases over a period of time. The feed natural gas stream is cooled in a main heat exchanger and is rectified in a double rectification column. A primary product methane stream and a secondary nitrogen-enriched product stream are withdrawn from the rectification column. The secondary nitrogen-enriched product stream has a mole fraction of methane at or above a chosen minimum value when the said mole fraction of nitrogen is at a minimum. When the said mole fraction of nitrogen rises to a value at which the mole fraction of methane in the secondary nitrogen-enriched product stream falls below the chosen minimum, a part of the feed gas is introduced through conduit into the secondary nitrogen-enriched product stream so as to restore its mole fraction of methane to the chosen minimum value or a value thereabove.Type: ApplicationFiled: November 5, 2003Publication date: September 23, 2004Inventors: John Douglas Oakey, Brian Morice Davies
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Publication number: 20040103687Abstract: Nitrogen is rejected from a pressurised feed gas stream comprising methane and nitrogen by cooling the feed gas stream in a main heat exchanger 10 and rectifying the cooled feed gas stream in a double rectification column 20 comprising a higher pressure rectification column 22, a lower pressure rectification column 24, and a condenser-reboiler 25 placing the higher pressure column 22 in heat exchange relationship with the lower pressure column 24. A pump 50 withdraws a methane product stream from the column 24. The methane product stream is pressurised by the pump 50 and is vaporised in the main heat exchanger 10. The pressurised feed gas stream is expanded with the performance of external work in an expansion turbine 6 upstream of the main heat exchanger 10.Type: ApplicationFiled: September 3, 2003Publication date: June 3, 2004Inventors: Stephen Roger Clare, John Douglas Oakey
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Publication number: 20040079108Abstract: Nitrogen is rejected from a feed gas stream comprising methane and nitrogen so as to form a methane product. The feed gas is separated in a double rectification column comprising a higher pressure rectification column 14, a lower pressure rectification column 16, and a condenser-reboiler 18. Product methane is withdrawn from the column 16 by a pump 42 and is vaporised. A flow of gas is recycled from the column 16 to the column 14, being warmed in main heat exchanger 4. A first part of the warmed recycle gas being compressed in compressor 48 to a first pressure and introduced into the higher pressure rectification column 14. A second part of the warmed recycle gas is compressed in the compressor 48 and condensed in a second condenser-reboiler associated with an intermediate main exchange region of the lower pressure column 16 and is returned to the higher pressure rectification column 14.Type: ApplicationFiled: July 1, 2003Publication date: April 29, 2004Inventor: John Douglas Oakey
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Patent number: 6637239Abstract: Nitrogen is rejected from a feed gas stream comprising methane and nitrogen so as to form a methane product. The feed gas stream is cooled in a main heat exchanger and is rectified in a double rectification column comprising a higher pressure rectification column, a lower pressure rectification column, and a condenser-reboiler placing the higher pressure rectification column in heat exchange relationship with the lower pressure rectification column. At least part of the feed gas stream is expanded into the higher pressure rectification column through an expansion valve, the feed gas stream being partially liquefied upstream of the double rectification column. Over a period of time the mole fraction of nitrogen in the feed gas mixture increases. At a suitable increased nitrogen mole fraction, operation of a second double rectification column in parallel with the first double rectification column is commenced.Type: GrantFiled: July 10, 2002Date of Patent: October 28, 2003Assignee: The BOC Group plcInventor: John Douglas Oakey
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Patent number: 6609393Abstract: A method of forming a methane product by rejecting nitrogen from a feed gas stream comprising methane and nitrogen is disclosed. After being cooled in a main heat exchanger, the feed gas stream is rectified in a double rectification column comprising a higher pressure column and a lower pressure column. A gas flow is recycled from the lower pressure column to the higher pressure column. Part of the recycle flow is compressed in a compressor, cooled, liquefied in a condenser-reboiler and introduced into the higher pressure column. Another part of the recycle flow is also compressed in the compressor, cooled, liquefied in the main heat exchanger or by expansion, and introduced into the double rectification column in liquid state. At least part of the cooling of both parts of the recycle gas is performed in the main heat exchanger. A liquid methane product is withdrawn from the lower pressure column.Type: GrantFiled: May 9, 2002Date of Patent: August 26, 2003Assignee: The BOC Group plcInventor: John Douglas Oakey
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Patent number: 6584803Abstract: Nitrogen is rejected from a feed gas stream comprising methane and nitrogen so as to form a methane product. The feed gas stream is cooled in a main heat exchanger and rectified in a double rectification column comprising a higher pressure column, a lower pressure column and a condenser-reboiler placing the higher and lower pressure rectification columns in heat exchange relationship with each other. At least part of the feed gas stream is expanded through a valve into the higher pressure rectification column and the feed gas stream is partially liquefied upstream of the double rectification column. Over a period of time, the mole fraction of nitrogen in the feed gas stream may increase. The operating pressure of the lower pressure rectification column is periodically increased in response to increases in the mole fraction of nitrogen. A back pressure valve may be periodically adjusted to effect the increase in pressure.Type: GrantFiled: July 10, 2002Date of Patent: July 1, 2003Assignee: The BOC Group plcInventor: John Douglas Oakey
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Publication number: 20030029191Abstract: Nitrogen is rejected from a feed gas stream comprising methane and nitrogen so as to form a methane product. The feed gas stream is cooled in a main heat exchanger and is rectified in a double rectification column comprising a higher pressure rectification column, a lower pressure rectification column, and a condenser-reboiler placing the higher pressure rectification column in heat exchange relationship with the lower pressure rectification column. At least part of the feed gas stream is expanded into the higher pressure rectification column through an expansion valve, the feed gas stream being partially liquefied upstream of the double rectification column. Over a period of time the mole fraction of nitrogen in the feed gas mixture increases. At a suitable increased nitrogen mole fraction, operation of a second double rectification column in parallel with the first double rectification column is commenced.Type: ApplicationFiled: July 10, 2002Publication date: February 13, 2003Inventor: John Douglas Oakey
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Publication number: 20030019241Abstract: Nitrogen is rejected from a feed gas stream comprising methane and nitrogen so as to form a methane product. The feed gas stream is cooled in a main heat exchanger and rectified in a double rectification column comprising a higher pressure column, a lower pressure column and a condenser-reboiler placing the higher and lower pressure rectification columns in heat exchange relationship with each other. At least part of the feed gas stream is expanded through a valve into the higher pressure rectification column and the feed gas stream is partially liquefied upstream of the double rectification column. Over a period of time, the mole fraction of nitrogen in the feed gas stream may increase. The operating pressure of the lower pressure rectification column is periodically increased in response to increases in the mole fraction of nitrogen. A back pressure valve may be periodically adjusted to effect the increase in pressure.Type: ApplicationFiled: July 10, 2002Publication date: January 30, 2003Inventor: John Douglas Oakey
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Publication number: 20020194866Abstract: A method of forming a methane product by rejecting nitrogen from a feed gas stream comprising methane and nitrogen is disclosed. After being cooled in a main heat exchanger, the feed gas stream is rectified in a double rectification column comprising a higher pressure column and a lower pressure column. A gas flow is recycled from the lower pressure column to the higher pressure column. Part of the recycle flow is compressed in a compressor, cooled, liquefied in a condenser-reboiler and introduced into the higher pressure column. Another part of the recycle flow is also compressed in the compressor, cooled, liquefied in the main heat exchanger or by expansion, and introduced into the double rectification column in liquid state. At least part of the cooling of both parts of the recycle gas is performed in the main heat exchanger. A liquid methane product is withdrawn from the lower pressure column.Type: ApplicationFiled: May 9, 2002Publication date: December 26, 2002Inventor: John Douglas Oakey
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Patent number: 6257019Abstract: Nitrogen is produced by separation of it from air. Nitrogen so separated is condensed. Most or all of the nitrogen is separated by rectification. At least some of the condensed nitrogen is employed as reflux in the rectification. The nitrogen is both separated and condensed at three or more different pressures.Type: GrantFiled: November 24, 1998Date of Patent: July 10, 2001Assignee: The BOC Group plcInventors: John Douglas Oakey, Paul Higginbotham
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Patent number: 6141989Abstract: Air is separated in a double rectification column comprising a higher pressure rectification column, a lower pressure rectification column, and a first condenser-reboiler, of which the condensing passages communicate with an upper region of the higher pressure rectification column, and the reboiling passage communicate with a lower region of the lower pressure rectification column. A second condenser-reboiler is operated so as to reboil a liquid fraction obtained in the higher pressure rectification column. A stream of the air to be separated is partially or totally condensed by indirect heat exchange with a stream of nitrogen condensed in the first condenser-reboiler. At least part of the stream of condensed nitrogen is taken as product downstream of its heat exchange with the second stream of compressed air.Type: GrantFiled: December 17, 1998Date of Patent: November 7, 2000Assignee: The BOC Group plcInventor: John Douglas Oakey
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Patent number: 5862680Abstract: Air is separated in an arrangement of rectification columns comprising a double rectification column having a higher pressure column and a lower pressure rectification column, an intermediate pressure rectification column, and a side rectification column communicating with the lower pressure column. The side rectification column is provided with a condenser and the intermediate pressure rectification column with a reboiler and a further condenser. A stream of oxygen-enriched liquid is withdrawn from the bottom of the higher pressure column through an outlet and is separated in the intermediate pressure rectification column. The reboiler is heated by a stream typically withdrawn from the side rectification column through an outlet thereof. The condensers of the side rectification column and the intermediate column are cooled by streams having different oxygen mole fractions.Type: GrantFiled: September 5, 1997Date of Patent: January 26, 1999Assignee: The BOC Group plcInventors: Paul Higginbotham, John Douglas Oakey
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Patent number: 5852940Abstract: Air is separated in an arrangement of rectification columns comprising a double rectification column (which has a higher pressure column and a lower pressure column), an intermediate pressure rectification column and a side rectification column communicating with the lower pressure column. The side rectification column is provided with a condenser and the intermediate pressure rectification column with a reboiler and a condenser. A stream of oxygen-enriched liquid and a stream of liquid air are withdrawn from the higher pressure column through outlets and are separated in the intermediate pressure rectification column. The reboiler is heated by a stream typically withdrawn from the side rectification column through an outlet. A stream of liquid is withdrawn through an outlet at the bottom of the intermediate pressure rectification column is used to cool the condenser and is separated in the lower pressure rectification column.Type: GrantFiled: September 18, 1997Date of Patent: December 29, 1998Assignee: The BOC Group plcInventors: Paul Higginbotham, John Douglas Oakey