Patents by Inventor Alex R. Hobson
Alex R. Hobson 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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Publication number: 20020022123Abstract: A fuel cell comprising at least one composite membrane which includes a porous support impregnated with ion exchange resin to make the pores of the support occlusive, wherein the thickness of the composite membrane is less than 0.025 mm. The membrane is strong and has good ionic conductivity. Methods of making the composite membrane are also disclosed.Type: ApplicationFiled: April 25, 2001Publication date: February 21, 2002Inventors: Bamdad Bahar, Alex R. Hobson, Jeffry A. Kolde, Robert S. Mallouk
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Publication number: 20020011684Abstract: An integral composite membrane is provided including a porous polymeric membrane impregnated with a perfluoro ion exchange material to make the micropores of the membrane occlusive and a surfactant having a molecular weight greater than 100 wherein the thickness of the composite membrane is less than 0.025 mm. Methods for making and regenerating the integral composite membrane are also provided.Type: ApplicationFiled: August 3, 2001Publication date: January 31, 2002Inventors: Bamdad Bahar, Alex R. Hobson, Jeffry A. Kolde, Robert S. Mallouk
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Patent number: 6254978Abstract: An integral composite membrane is provided including a porous polymeric membrane impregnated with a perfluoro ion exchange material to make the micropores of the membrane occlusive and a surfactant having a molecular weight greater than 100 wherein the thickness of the composite membrane is less than 0.025 mm. Methods for making and regenerating the integral composite membrane are also provided.Type: GrantFiled: July 8, 1998Date of Patent: July 3, 2001Assignee: W. L. Gore & Associates, Inc.Inventors: Bamdad Bahar, Alex R. Hobson, Jeffrey A. Kolde
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Patent number: 6199979Abstract: This present invention relates to a filter element for the filtration of printing fluid within a printer cartridge of a printer. The filter element of the present invention includes a microporous filter media that removes contaminants from printing fluids such as ink, dye, wax, or the like.Type: GrantFiled: January 21, 1998Date of Patent: March 13, 2001Assignee: Gore Enterprise Holdings, Inc.Inventors: Alex R. Hobson, Robert L. Sassa
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Patent number: 6117528Abstract: The present invention is an improved device for delivering a release agent to fuser rollers employed in various printer devices, such as laser printers, fax machines, copier machines, etc. The release agent delivery device of the present invention comprises an elongated web of microporous membrane (e.g., expanded polytetrafluoroethylene) bonded to a substrate, filled with release agent, and mounted between two shafts. The web spans across the fuser roller so that the roller is simultaneously cleaned and oiled during normal operation. When the portion of the web in contact with the fuser roller becomes contaminated or expends its release agent supply, the web can be advanced to place a fresh surface in contact with the fuser roller.Type: GrantFiled: May 3, 1999Date of Patent: September 12, 2000Assignee: W. L. Gore & Associates, Inc.Inventors: Alex R. Hobson, Robert L. Sassa
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Patent number: 6041211Abstract: The present invention provides an improved cleaning material for critical imaging surfaces for use in a variety of printers, including laser printer, plain paper copiers and facsimile machines, etc. Moreover, the present invention utilizes the unique properties of expanded PTFE and sintered PTFE as the cleaning medium.Type: GrantFiled: June 6, 1996Date of Patent: March 21, 2000Assignee: W. L. Gore & Associates, Inc.Inventors: Alex R. Hobson, F. Michael J. McCollam, Beth P. Powell
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Patent number: 5891402Abstract: The present invention is an improved apparatus and method for using a catalyst to remove contaminants from a fluid stream. Catalytic particles are enmeshed within a highly porous expanded polytetrafluoroethylene (PTFE) substrate. The use of an expanded PTFE substrate provides added strength to the substrate and provides open and uniform porosity, thus, assuring proper exchange of molecules between the exterior surface of the substrate and the catalytic particles held within it. As such, the present invention is particularly suitable for use as a cross-flow filter for use in ozone generating office equipment (e.g., an electro-static photocopy machine) or similar application requiring minimal pressure drop across the filter unit.Type: GrantFiled: May 2, 1995Date of Patent: April 6, 1999Assignee: W. L. Gore & Associates, Inc.Inventors: Robert L. Sassa, Alex R. Hobson, Jeffrey C. Towler, James H. Bushong
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Patent number: 5849235Abstract: The present invention is an improved apparatus and method for using a catalyst to remove contaminants from a fluid stream. Catalytic particles are enmeshed within a highly porous expanded polytetrafluoroethylene (PTFE) substrate. The use of an expanded PTFE substrate provides added strength to the substrate and provides open and uniform porosity, thus, assuring proper exchange of molecules between the exterior surface of the substrate and the catalytic particles held within it. As such, the present invention is particularly suitable for use as a cross-flow filter for use in ozone generating office equipment (e.g., an electrostatic photocopy machine) or similar application requiring minimal pressure drop across the filter unit.Type: GrantFiled: September 30, 1996Date of Patent: December 15, 1998Assignee: W. L. Gore & Associates, inc.Inventors: Robert L. Sassa, Alex R. Hobson, Jeffrey C. Towler, James H. Bushong
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Patent number: 5800908Abstract: The present invention is an improved device for delivering a release agent to fuser rollers employed in various printer devices, such as laser printers, fax machines, copier machines, etc. The release agent delivery device of the present invention comprises an elongated web of microporous membrane (e.g., expanded polytetrafluoroethylene) bonded to a substrate, filled with release agent, and mounted between two shafts. The web spans across the fuser roller so that the roller is simultaneously cleaned and oiled during normal operation. When the portion of the web in contact with the fuser roller becomes contaminated or expends its release agent supply, the web can be advanced to place a fresh surface in contact with the fuser roller.Type: GrantFiled: January 30, 1996Date of Patent: September 1, 1998Assignee: W. L. Gore & Associates, Inc.Inventors: Alex R. Hobson, Robert L. Sassa, Beth P. Powell
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Patent number: 5788770Abstract: The present invention is an improved device for delivering a release agent to fuser rollers employed in various printer devices, such as laser printers, fax machines, copier machines, etc. The release agent delivery device of the present invention comprises an elongated web of microporous membrane (e.g., expanded polytetrafluoroethylene) bonded to a substrate, filled with release agent, and mounted between two shafts. The web spans across the fuser roller so that the roller is simultaneously cleaned and oiled during normal operation. When the portion of the web in contact with the fuser roller becomes contaminated or expends its release agent supply, the web can be advanced to place a fresh surface in contact with the fuser roller.Type: GrantFiled: January 21, 1997Date of Patent: August 4, 1998Assignee: W. L. Gore & Associates, Inc.Inventors: Alex R. Hobson, Robert L. Sassa, Beth P. Powell
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Patent number: 5709748Abstract: An improved release agent delivery apparatus is disclosed for use in laser printers, plain paper copiers, facsimile machines, and similar printing apparatus. The delivery apparatus comprises an absorbent textile core filled with release agent, a permeable membrane surrounding the textile core to form a sheathed wick member, and a mounting sleeve adapted to attach the sheathed wick member in operative contact with the printer. The apparatus has numerous operational advantages over existing oil delivery apparatus, including providing multiple contact surfaces for longer operational life before replacement, ease in cleaning and regeneration, improved durability and reduced wear, and more compact and versatile operation.Type: GrantFiled: April 15, 1997Date of Patent: January 20, 1998Assignee: W. L. Gore & Associates, Inc.Inventors: Robert L. Sassa, Alex R. Hobson, Elizabeth Marie Crowley, Kristin E. Williamson
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Patent number: 5690739Abstract: An improved release agent delivery apparatus is disclosed for use in laser printers, plain paper copiers, facsimile machines, and similar printing apparatus. The delivery apparatus comprises an absorbent textile core filled with release agent, a permeable membrane surrounding the textile core to form a sheathed wick member, and a mounting sleeve adapted to attach the sheathed wick member in operative contact with the printer. The apparatus has numerous operational advantages over existing oil delivery apparatus, including providing multiple contact surfaces for longer operational life before replacement, ease in cleaning and regeneration, improved durability and reduced wear, and more compact and versatile operation.Type: GrantFiled: June 1, 1995Date of Patent: November 25, 1997Assignee: W. L. Gore & Associates, Inc.Inventors: Robert L. Sassa, Alex R. Hobson, Elizabeth Marie Crowley
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Patent number: 5635041Abstract: A composite membrane is provided which includes a base material and an ion exchange resin. The base material has a microstructure characterized by nodes interconnected by fibrils, or a microstructure characterized by fibrils with no nodes present. The ion exchange resin substantially impregnates the membrane such that the membrane is essentially air impermeable.Type: GrantFiled: December 5, 1995Date of Patent: June 3, 1997Assignee: W. L. Gore & Associates, Inc.Inventors: Bamdad Bahar, Alex R. Hobson, Jeffrey A. Kolde
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Patent number: 5599614Abstract: A composite membrane is provided which includes a base material and an ion exchange resin. The base material has a microstructure characterized by nodes interconnected by fibrils, or a microstructure characterized by fibrils with no nodes present. The ion exchange resin substantially impregnates the membrane such that the membrane is essentially air impermeable.Type: GrantFiled: November 21, 1995Date of Patent: February 4, 1997Assignee: W. L. Gore & Associates, Inc.Inventors: Bamdad Bahar, Alex R. Hobson, Jeffrey A. Kolde
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Patent number: 5547551Abstract: An ultra-thin composite membrane is provided which includes a base material and an ion exchange resin. The base material is a membrane which is defined by a thickness of less than 1 mil (0.025 mm) and a microstructure characterized by nodes interconnected by fibrils, or a microstructure characterized by fibrils with no nodes present. The ion exchange resin substantially impregnates the membrane such that the membrane is essentially air impermeable.Type: GrantFiled: March 15, 1995Date of Patent: August 20, 1996Assignee: W. L. Gore & Associates, Inc.Inventors: Bamdad Bahar, Alex R. Hobson, Jeffrey A. Kolde, David Zuckerbrod
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Patent number: 5527569Abstract: The present invention is an improved electrically conductive filter media particularly suitable for use in applications where static electricity must be dissipated. The filter media of the present invention comprises a microporous filtration layer having electrically conductive particles embedded therein. When attached to support media, this structure provides exceptional filtration efficiency while assuring a consistent and evenly distributed electrical pathway to ground.Type: GrantFiled: August 22, 1994Date of Patent: June 18, 1996Assignee: W. L. Gore & Associates, Inc.Inventors: Alex R. Hobson, David E. Mooney, Stephen K. Stark
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Patent number: 5478423Abstract: An improved method for making a release agent delivery device for delivery of release agent to a roller is disclosed for use in laser printers, plain paper copiers, facsimile machines, and similar printing apparatus. The delivery apparatus comprises an absorbent textile core filled with release agent, a permeable membrane surrounding the textile core to form a sheathed wick member, and a mounting sleeve adapted to attach the sheathed wick member in operative contact with the printer. The apparatus has numerous operational advantages over existing oil delivery apparatus, including providing multiple contact surfaces for longer operational life before replacement, ease in cleaning and regeneration, improved durability and reduced wear, and more compact and versatile operation.Type: GrantFiled: April 28, 1994Date of Patent: December 26, 1995Assignee: W. L. Gore & Associates, Inc.Inventors: Robert L. Sassa, Alex R. Hobson, Elizabeth M. Hamilton, Kristin E. Wiliamson
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Patent number: RE37307Abstract: An ultra-thin composite membrane is provided which includes a base material and an ion exchange resin. The base material is a membrane which is defined by a thickness of less than 1 mil (0.025 mm) 0.8 mils and a microstructure characterized by node interconnected by fibrils, or a microstructure characterized by fibrils with no nodes present. The ion exchange resin substantially impregnates the membrane such that the membrane is essentially air impermeable.Type: GrantFiled: August 20, 1998Date of Patent: August 7, 2001Assignee: W. L. Gore & Associates, Inc.Inventors: Bamdad A. Bahar, Robert S. Mallouk, Alex R. Hobson, Jeffrey A. Kolde
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Patent number: RE37656Abstract: A composite membrane is provided which includes a base material and an ion exchange resin. The base material has a microstructure characterized by nodes interconnected by fibrils, or a microstructure characterized by fibrils with no nodes present. The ion exchange resin substantially impregnates the membrane such that the membrane is essentially air impermeable.Type: GrantFiled: June 3, 1999Date of Patent: April 16, 2002Assignee: W.L. Gore & Associates, Inc.Inventors: Bamdad Bahar, Robert S. Mallouk, Alex R. Hobson, Jeffrey A. Kolde
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Patent number: RE37701Abstract: A composite membrane is provided which includes a base material and an ion exchange resin. The base material has a microstructure characterized by nodes interconnected by fibrils, or a microstructure characterized by fibrils with no nodes present. The ion exchange resin substantially impregnates the membrane such that the membrane is essentially air impermeable.Type: GrantFiled: April 4, 2000Date of Patent: May 14, 2002Assignee: W. L. Gore & Associates, Inc.Inventors: Bamdad Bahar, Robert S. Mallouk, Alex R. Hobson, Jeffrey A. Kolde