Patents by Inventor Teri A. Walker
Teri A. Walker 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: 8652229Abstract: A filtration device including a filtration medium having a plurality of nanofibers of diameters less than 1 micron formed into a fiber mat in the presence of an abruptly varying electric field. The filtration device includes a support attached to the filtration medium and having openings for fluid flow therethrough. A device for making a filter material. The device includes an electrospinning element configured to electrospin a plurality of fibers from a tip of the electrospinning element, a collector opposed to the electrospinning element configured to collect electrospun fibers on a surface of the collector, and an electric field modulation device configured to abruptly vary an electric field at the collector at least once during electrospinning of the fibers. A method for making a filter material.Type: GrantFiled: October 8, 2009Date of Patent: February 18, 2014Assignee: Research Triangle InstituteInventors: David S. Ensor, Howard J. Walls, Anthony L. Andrady, Teri A. Walker
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Publication number: 20110174158Abstract: A filtration device including a filtration medium having a plurality of nanofibers of diameters less than 1 micron formed into a fiber mat in the presence of an abruptly varying electric field during electrospinning of the plurality of nanofibers. The nanofibers retain charge in the filtration medium from the electrospinning. The filtration device includes a support attached to the filtration medium and having openings for fluid flow therethrough. A method for making a filter material. The method provides a support having openings for fluid flow therethrough, electrospins nanofibers across an entirety of the openings, abruptly varies an electric field at the collector at least once during electrospinning of the fibers, and retains charge on the nanofibers after formation of the filtration medium.Type: ApplicationFiled: May 13, 2009Publication date: July 21, 2011Applicant: Research Triangle InstituteInventors: Howard J. Walls, David S. Ensor, Anthony L. Andrady, Teri A. Walker
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Patent number: 7789930Abstract: A filtration device including a filtration medium having a plurality of nanofibers of diameters less than 1 micron formed into a fiber mat in the presence of an abruptly varying electric field. The filtration device includes a support attached to the filtration medium and having openings for fluid flow therethrough. A device for making a filter material. The device includes an electrospinning element configured to electrospin a plurality of fibers from a tip of the electrospinning element, a collector opposed to the electrospinning element configured to collect electrospun fibers on a surface of the collector, and an electric field modulation device configured to abruptly vary an electric field at the collector at least once during electrospinning of the fibers. A method for making a filter material.Type: GrantFiled: November 13, 2006Date of Patent: September 7, 2010Assignee: Research Triangle InstituteInventors: David S. Ensor, Howard J. Walls, Anthony L. Andrady, Teri A. Walker
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Publication number: 20100031617Abstract: A filtration device including a filtration medium having a plurality of nanofibers of diameters less than 1 micron formed into a fiber mat in the presence of an abruptly varying electric field. The filtration device includes a support attached to the filtration medium and having openings for fluid flow therethrough. A device for making a filter material. The device includes an electrospinning element configured to electrospin a plurality of fibers from a tip of the electrospinning element, a collector opposed to the electrospinning element configured to collect electrospun fibers on a surface of the collector, and an electric field modulation device configured to abruptly vary an electric field at the collector at least once during electrospinning of the fibers. A method for making a filter material.Type: ApplicationFiled: October 8, 2009Publication date: February 11, 2010Applicant: Research Triangle InsituteInventors: DAVID S. ENSOR, Howard J. Walls, Anthony L. Andrady, Teri A. Walker
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Patent number: 7592277Abstract: An apparatus and method in which the apparatus includes a first electrospinning device configured to electrospin first fibers of a first substance, a second electrospinning device configured to electrospin second fibers of a second substance such that first and second fibers combine in a mat formation region, and a biasing device configured to bias the first electrospinning device with a first electric polarity and to bias the second electrospinning device with a second electric polarity of opposite polarity to the first electric polarity to promote attraction and coalescence between the first and second fibers. The method electrospins under the first electric polarity first fibers from the first substance, electrospins under the second electric polarity fibers from the second substance, and coalesces the first and second fibers to form the fiber mat.Type: GrantFiled: May 17, 2005Date of Patent: September 22, 2009Assignee: Research Triangle InstituteInventors: Anthony L. Andrady, David S. Ensor, Teri A. Walker, Purva Prabhu
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Publication number: 20080184886Abstract: A thermal preconcentrator unit and a method for concentrating chemical species. The thermal preconcentrator unit includes a thermoelectric device having a temperature controlled surface and a sorbent material configured to concentrate the chemical species. The sorbent material is disposed on and in thermal contact with the temperature controlled surface. The thermoelectric device is configured to cool and heat the temperature controlled surface to promote sorption and desorption of chemical species onto and from the sorbent material. The method provides a temperature controlled surface and exposes the chemical species to a sorbent material disposed on the temperature controlled surface to concentrate the chemical species thereon.Type: ApplicationFiled: February 2, 2007Publication date: August 7, 2008Applicant: Research Triangle InstituteInventors: Jenia A. Tufts, Anthony L. Andrady, Teri A. Walker, David S. Ensor
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Publication number: 20080110342Abstract: A filtration device including a filtration medium having a plurality of nanofibers of diameters less than 1 micron formed into a fiber mat in the presence of an abruptly varying electric field. The filtration device includes a support attached to the filtration medium and having openings for fluid flow therethrough. A device for making a filter material. The device includes an electrospinning element configured to electrospin a plurality of fibers from a tip of the electrospinning element, a collector opposed to the electrospinning element configured to collect electrospun fibers on a surface of the collector, and an electric field modulation device configured to abruptly vary an electric field at the collector at least once during electrospinning of the fibers. A method for making a filter material.Type: ApplicationFiled: November 13, 2006Publication date: May 15, 2008Applicant: Research Triangle InstituteInventors: David S. Ensor, Howard J. Walls, Anthony L. Andrady, Teri A. Walker
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Publication number: 20060264140Abstract: An apparatus and method in which the apparatus includes a first electrospinning device configured to electrospin first fibers of a first substance, a second electrospinning device configured to electrospin second fibers of a second substance such that first and second fibers combine in a mat formation region, and a biasing device configured to bias the first electrospinning device with a first electric polarity and to bias the second electrospinning device with a second electric polarity of opposite polarity to the first electric polarity to promote attraction and coalescence between the first and second fibers. The method electrospins under the first electric polarity first fibers from the first substance, electrospins under the second electric polarity fibers from the second substance, and coalesces the first and second fibers to form the fiber mat.Type: ApplicationFiled: May 17, 2005Publication date: November 23, 2006Applicant: Research Triangle InstituteInventors: Anthony Andrady, David Ensor, Teri Walker, Purva Prabhu
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Patent number: D828873Type: GrantFiled: July 22, 2016Date of Patent: September 18, 2018Inventor: Teri Walker