Patents by Inventor Brent Keller
Brent Keller 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: 20240110022Abstract: A thermoplastic polymer composition comprises a thermoplastic polymer, at least one clarifying agent, and at least one coloring agent. A method for producing a thermoplastic polymer composition comprises the steps of separately providing a thermoplastic polymer and an additive composition and then mixing the thermoplastic polymer and additive composition. The additive composition comprises a clarifying agent and a coloring agent. Another method for producing a thermoplastic polymer composition comprises the steps of separately providing a thermoplastic polymer, at least one clarifying agent, and at least one coloring agent and then mixing the thermoplastic polymer, the clarifying agent, and the coloring agent. The thermoplastic polymer exhibits a blue hue factor (?) of 0.93 to 1.1 and/or a normalized brightness value (Y?) of 64.0 to 69.6. An additive composition contains at least one clarifying agent and at least one coloring agent.Type: ApplicationFiled: December 4, 2023Publication date: April 4, 2024Inventors: Xinfei Yu, Christopher Kochanowicz, Nathan Mehl, Keith Keller, Brent Johnson, Clifford Bynum
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Publication number: 20230360290Abstract: A head-mounted display system, including an image source operable to generate image-bearing light, a near-eye display operable to convey the image-bearing light beams to an eyebox within which a virtual image can be viewed, a camera located adjacent to the near-eye display, wherein the camera has a center of focus, and a processing unit operable to output signals to the image source, wherein the processing unit is operable form a reticle within the virtual image via the image source and dynamically position the reticle at the camera center of focus.Type: ApplicationFiled: October 1, 2021Publication date: November 9, 2023Inventors: Brent Keller, Paul J. Travers, Adam C. Gogolski
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Publication number: 20230173435Abstract: Embodiments described herein relate generally to durable graphene oxide membranes for fluid filtration. For example, the graphene oxide membranes can be durable under high temperatures non-neutral pH, and/or high pressures. One aspect of the present disclosure relates to a filtration apparatus comprising: a support substrate, and a graphene oxide membrane disposed on the support substrate. The graphene oxide membrane has a first lactose rejection rate of at least 50% with a first 1 wt % lactose solution at room temperature. The graphene oxide membrane has a second lactose rejection rate of at least 50% with a second 1 wt % lactose solution at room temperature after the graphene oxide membrane is contacted with a solution that is at least 80° C. for a period of time.Type: ApplicationFiled: October 5, 2022Publication date: June 8, 2023Applicant: Via Separations, Inc.Inventors: Stephen FRAYNE, Michelle MACLEOD, Brandon Ian MACDONALD, Lymaris ORTIZ RIVERA, Brent KELLER
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Patent number: 11498034Abstract: Embodiments described herein relate generally to durable graphene oxide membranes for fluid filtration. For example, the graphene oxide membranes can be durable under high temperatures non-neutral pH, and/or high pressures. One aspect of the present disclosure relates to a filtration apparatus comprising: a support substrate, and a graphene oxide membrane disposed on the support substrate. The graphene oxide membrane has a first lactose rejection rate of at least 50% with a first 1 wt % lactose solution at room temperature. The graphene oxide membrane has a second lactose rejection rate of at least 50% with a second 1 wt % lactose solution at room temperature after the graphene oxide membrane is contacted with a solution that is at least 80° C. for a period of time.Type: GrantFiled: July 20, 2021Date of Patent: November 15, 2022Assignee: Via Separations, Inc.Inventors: Stephen Frayne, Michelle Macleod, Brandon Ian MacDonald, Lymaris Ortiz Rivera, Brent Keller
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Patent number: 11446609Abstract: Embodiments described herein relate generally to systems, apparatus, and methods for using graphene oxide-containing membranes for separation and concentration processes. In some embodiments, a fluid component having a first concentration in a fluid mixture can be concentrated using a first distillation process to a second concentration. In some embodiments, the fluid component can be concentrated from the second concentration to a third concentration using a graphene oxide-containing membrane. In some embodiments, the fluid component can be concentrated from the third concentration to a fourth concentration using a second distillation process. In some embodiments, the fluid component can have an azeotropic concentration between the second concentration and the third concentration.Type: GrantFiled: September 11, 2019Date of Patent: September 20, 2022Assignee: Via Separations, Inc.Inventor: Brent Keller
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Publication number: 20210370242Abstract: Embodiments described herein relate generally to graphene oxide membranes for fluid filtration and more specifically to graphene oxide membranes having tunable permeability, rejection rate, and flux. Some embodiments of the graphene oxide membranes disclosed herein are characterized as having a flux of at least about 2.5×10?4 gallons per square foot per day per psi with a 1 wt % lactose solution at room temperature, and a lactose rejection rate of at least 50% with a 1 wt % lactose solution.Type: ApplicationFiled: August 13, 2021Publication date: December 2, 2021Applicant: Via Separations, Inc.Inventors: Michelle MACLEOD, Stephen FRAYNE, Brandon Ian MACDONALD, Lymaris ORTIZ RIVERA, Brent KELLER
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Publication number: 20210354094Abstract: Embodiments described herein relate generally to durable graphene oxide membranes for fluid filtration. For example, the graphene oxide membranes can be durable under high temperatures non-neutral pH, and/or high pressures. One aspect of the present disclosure relates to a filtration apparatus comprising: a support substrate, and a graphene oxide membrane disposed on the support substrate. The graphene oxide membrane has a first lactose rejection rate of at least 50% with a first 1 wt % lactose solution at room temperature. The graphene oxide membrane has a second lactose rejection rate of at least 50% with a second 1 wt % lactose solution at room temperature after the graphene oxide membrane is contacted with a solution that is at least 80° C. for a period of time.Type: ApplicationFiled: July 20, 2021Publication date: November 18, 2021Applicant: Via Separations, Inc.Inventors: Stephen FRAYNE, Michelle MACLEOD, Brandon Ian MACDONALD, Lymaris ORTIZ RIVERA, Brent KELLER
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Patent number: 11123694Abstract: Embodiments described herein relate generally to graphene oxide membranes for fluid filtration and more specifically to graphene oxide membranes having tunable permeability, rejection rate, and flux. Some embodiments of the graphene oxide membranes disclosed herein are characterized as having a flux of at least about 2.5×10?4 gallons per square foot per day per psi with a 1 wt % lactose solution at room temperature, and a lactose rejection rate of at least 50% with a 1 wt % lactose solution.Type: GrantFiled: May 28, 2020Date of Patent: September 21, 2021Assignee: Via Separations, Inc.Inventors: Michelle MacLeod, Stephen Frayne, Brandon Ian MacDonald, Lymaris Ortiz Rivera, Brent Keller
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Patent number: 11097227Abstract: Embodiments described herein relate generally to durable graphene oxide membranes for fluid filtration. For example, the graphene oxide membranes can be durable under high temperatures non-neutral pH, and/or high pressures. One aspect of the present disclosure relates to a filtration apparatus comprising: a support substrate, and a graphene oxide membrane disposed on the support substrate. The graphene oxide membrane has a first lactose rejection rate of at least 50% with a first 1 wt % lactose solution at room temperature. The graphene oxide membrane has a second lactose rejection rate of at least 50% with a second 1 wt % lactose solution at room temperature after the graphene oxide membrane is contacted with a solution that is at least 80° C. for a period of time.Type: GrantFiled: May 29, 2020Date of Patent: August 24, 2021Assignee: Via Separations, Inc.Inventors: Stephen Frayne, Michelle Macleod, Brandon Ian MacDonald, Lymaris Ortiz Rivera, Brent Keller
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Patent number: 10974208Abstract: Membranes comprising graphene oxide sheets and associated filter media and methods are provided. In some embodiments, a membrane may comprise graphene oxide sheets that have undergone one or more chemical treatments. The chemical treatment(s) may impart beneficial properties to the membrane, such as a relatively small d-spacing, compatibility with a broad range of environments, physical stability, and charge neutrality. For example, the graphene oxide sheets may undergo one or more chemical treatments that form chemical linkages between at least a portion of the graphene oxide sheets in the membrane. Such chemical linkages may impart a small d-spacing, broad compatibility, and/or allow relatively thick membranes to be formed. In certain embodiments, the graphene oxide sheets may undergo one or more chemical treatment that imparts relative charge neutrality to the membrane by altering the ionizability of certain functional groups.Type: GrantFiled: May 11, 2017Date of Patent: April 13, 2021Assignee: Massachusetts Institute of TechnologyInventors: Shreya H. Dave, Brent Keller, Ggoch Ddeul Han, Jeffrey C. Grossman
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Publication number: 20200396799Abstract: The present disclosure is directed to processes for forming or otherwise creating a transparent, conductive film from a heavy hydrocarbon material. It allows for what is often considered to be waste material to be transformed into a useful product, such as a heating element. Such heating elements can be incorporated into many contexts where it can be important to have transparency and/or a thin heating element, such as in windshields. The process involves dissolving a heavy hydrocarbon material in a solvent, casting the heavy hydrocarbon solution that results from the dissolving onto a substrate to form a film, and then annealing the film. The disclosure also provides for objects in which such resulting films can be used, such as Joule heaters.Type: ApplicationFiled: June 15, 2020Publication date: December 17, 2020Inventors: Jeffrey Grossman, Brent Keller, Owen Morris, Mark Disko, Heather Elsen, Xining Zang, Nicola Ferralis, Ximena Hasbach
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Publication number: 20200360868Abstract: Embodiments described herein relate generally to graphene oxide membranes for fluid filtration and more specifically to graphene oxide membranes having tunable permeability, rejection rate, and flux. Some embodiments of the graphene oxide membranes disclosed herein are characterized as having a flux of at least about 2.5×10?4 gallons per square foot per day per psi with a 1 wt % lactose solution at room temperature, and a lactose rejection rate of at least 50% with a 1 wt % lactose solution.Type: ApplicationFiled: May 28, 2020Publication date: November 19, 2020Inventors: Michelle MACLEOD, Stephen FRAYNE, Brandon Ian MACDONALD, Lymaris ORTIZ RIVERA, Brent KELLER
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Publication number: 20200360869Abstract: Embodiments described herein relate generally to durable graphene oxide membranes for fluid filtration. For example, the graphene oxide membranes can be durable under high temperatures non-neutral pH, and/or high pressures. One aspect of the present disclosure relates to a filtration apparatus comprising: a support substrate, and a graphene oxide membrane disposed on the support substrate. The graphene oxide membrane has a first lactose rejection rate of at least 50% with a first 1 wt % lactose solution at room temperature. The graphene oxide membrane has a second lactose rejection rate of at least 50% with a second 1 wt % lactose solution at room temperature after the graphene oxide membrane is contacted with a solution that is at least 80° C. for a period of time.Type: ApplicationFiled: May 29, 2020Publication date: November 19, 2020Inventors: Stephen FRAYNE, Michelle MACLEOD, Brandon Ian MACDONALD, Lymaris ORTIZ RIVERA, Brent KELLER
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Publication number: 20200078735Abstract: Embodiments described herein relate generally to systems, apparatus, and methods for using graphene oxide-containing membranes for separation and concentration processes. In some embodiments, a fluid component having a first concentration in a fluid mixture can be concentrated using a first distillation process to a second concentration. In some embodiments, the fluid component can be concentrated from the second concentration to a third concentration using a graphene oxide-containing membrane. In some embodiments, the fluid component can be concentrated from the third concentration to a fourth concentration using a second distillation process. In some embodiments, the fluid component can have an azeotropic concentration between the second concentration and the third concentration.Type: ApplicationFiled: September 11, 2019Publication date: March 12, 2020Inventor: Brent KELLER
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Publication number: 20170341034Abstract: Membranes comprising graphene oxide sheets and associated filter media and methods are provided. In some embodiments, a membrane may comprise graphene oxide sheets that have undergone one or more chemical treatments. The chemical treatment(s) may impart beneficial properties to the membrane, such as a relatively small d-spacing, compatibility with a broad range of environments, physical stability, and charge neutrality. For example, the graphene oxide sheets may undergo one or more chemical treatments that form chemical linkages between at least a portion of the graphene oxide sheets in the membrane. Such chemical linkages may impart a small d-spacing, broad compatibility, and/or allow relatively thick membranes to be formed. In certain embodiments, the graphene oxide sheets may undergo one or more chemical treatment that imparts relative charge neutrality to the membrane by altering the ionizability of certain functional groups.Type: ApplicationFiled: May 11, 2017Publication date: November 30, 2017Applicant: Massachusetts Institute of TechnologyInventors: Shreya H. Dave, Brent Keller, Ggoch Ddeul Han, Jeffrey C. Grossman
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Patent number: 8595716Abstract: A method of updating an electronic device. The device has a non-volatile memory divided into at least three non-overlapping sections, a bootstrap image section, a updater image section, and a application image section. The method includes erasing the application image section of the non-volatile memory, receiving a firmware update, writing the firmware update into the application image section, rebooting the electronic device, determining one of an application program and an updater program resides in the application image section, executing the application program when the application program is determined to reside in the application image section, erasing the updater image section of the non-volatile memory when the updater program is determined to reside in the application image section, and moving the updater program from the application image section to the updater image section.Type: GrantFiled: April 6, 2011Date of Patent: November 26, 2013Assignee: Robert Bosch GmbHInventors: Brent Keller, John Sotack, Alan Hayter
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Publication number: 20120260244Abstract: A method of updating an electronic device. The device has a non-volatile memory divided into at least three non-overlapping sections, a bootstrap image section, a updater image section, and a application image section. The method includes erasing the application image section of the non-volatile memory, receiving a firmware update, writing the firmware update into the application image section, rebooting the electronic device, determining one of an application program and an updater program resides in the application image section, executing the application program when the application program is determined to reside in the application image section, erasing the updater image section of the non-volatile memory when the updater program is determined to reside in the application image section, and moving the updater program from the application image section to the updater image section.Type: ApplicationFiled: April 6, 2011Publication date: October 11, 2012Inventors: Brent Keller, John Sotack, Alan Hayter
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Patent number: 7715050Abstract: In a method and system for processing a photographic image having lightness values, L*, representing one of the colorimetric values of an original scene, the photographic image is transformed. The transformed image has a gamma as a function of CIE 1976 L*, which includes a dark region having a rising slope, a light region having a falling slope, and a plateau region having a slope constantly within 5 percent of a maximum value in said plateau region. The rising slope is at least twice as large as the absolute value of the falling slope. The plateau region is between 10 L* and 30 L* wide. Gamma is a derivative of visually perceived reproduced CIE 1976 L* versus scene CIE 1976 L*. Gamma has a maximum slope between 1.5 and 2.0.Type: GrantFiled: April 4, 2008Date of Patent: May 11, 2010Assignee: Eastman Kodak CompanyInventors: Karin Topfer, Thomas B. Brust, Brent Keller, Elaine W. Jin
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Publication number: 20080186520Abstract: In a method and system for processing a photographic image having lightness values, L*, representing one of the colorimetric values of an original scene, the photographic image is transformed. The transformed image has a gamma as a function of CIE 1976 L*, which includes a dark region having a rising slope, a light region having a falling slope, and a plateau region having a slope constantly within 5 percent of a maximum value in said plateau region. The rising slope is at least twice as large as the absolute value of the falling slope. The plateau region is between 10 L* and 30 L* wide. Gamma is a derivative of visually perceived reproduced CIE 1976 L* versus scene CIE 1976 L*. Gamma has a maximum slope between 1.5 and 2.0.Type: ApplicationFiled: April 4, 2008Publication date: August 7, 2008Inventors: Karin Topfer, Thomas B. Brust, Brent Keller, Elaine W. Jin
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Patent number: 7372597Abstract: In a method and system for processing a photographic image having lightness values, L*, representing one of the colorimetric values of an original scene, the photographic image is transformed. The transformed image has a gamma as a function of CIE 1976 L*, which includes a dark region having a rising slope, a light region having a falling slope, and a plateau region having a slope constantly within 5 percent of a maximum value in said plateau region. The rising slope is at least twice as large as the absolute value of the falling slope. The plateau region is between 10 L* and 30 L* wide. Gamma is a derivative of visually perceived reproduced CIE 1976 L* versus scene CIE 1976 L*. Gamma has a maximum slope between 1.5 and 2.0.Type: GrantFiled: July 27, 2004Date of Patent: May 13, 2008Assignee: Eastman Kodak CompanyInventors: Karin Topfer, Thomas B. Brust, Brent Keller, Elaine W. Jin