Patents by Inventor Brian J. Walker
Brian J. 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: 9841544Abstract: Disclosed are a device and a method for the design and fabrication of the device for enhancing the brightness of luminescent molecules, nanostructures, and thin films. The device includes a mirror, a dielectric medium or spacer, an absorptive layer, and a luminescent layer. The absorptive layer is a continuous thin film of a strongly absorbing organic or inorganic material. The luminescent layer may be a continuous luminescent thin film or an arrangement of isolated luminescent species, e.g., organic or metal-organic dye molecules, semiconductor quantum dots, or other semiconductor nanostructures, supported on top of the absorptive layer.Type: GrantFiled: December 8, 2014Date of Patent: December 12, 2017Assignee: MASSACHUSETTS INSTITUTE OF TECHNOLOGYInventors: Gleb M. Akselrod, Moungi G. Bawendi, Vladimir Bulovic, Jonathan R. Tischler, William A. Tisdale, Brian J. Walker
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Publication number: 20150153493Abstract: Disclosed are a device and a method for the design and fabrication of the device for enhancing the brightness of luminescent molecules, nanostructures, and thin films. The device includes a mirror, a dielectric medium or spacer, an absorptive layer, and a luminescent layer. The absorptive layer is a continuous thin film of a strongly absorbing organic or inorganic material. The luminescent layer may be a continuous luminescent thin film or an arrangement of isolated luminescent species, e.g., organic or metal-organic dye molecules, semiconductor quantum dots, or other semiconductor nanostructures, supported on top of the absorptive layer.Type: ApplicationFiled: December 8, 2014Publication date: June 4, 2015Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGYInventors: Gleb M. Akselrod, Moungi G. Bawendi, Vladimir Bulovic, Jonathan R. Tischler, William A. Tisdale, Brian J. Walker
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Patent number: 8908261Abstract: Disclosed are a device and a method for the design and fabrication of the device for enhancing the brightness of luminescent molecules, nanostructures, and thin films. The device includes a mirror, a dielectric medium or spacer, an absorptive layer, and a luminescent layer. The absorptive layer is a continuous thin film of a strongly absorbing organic or inorganic material. The luminescent layer may be a continuous luminescent thin film or an arrangement of isolated luminescent species, e.g., organic or metal-organic dye molecules, semiconductor quantum dots, or other semiconductor nanostructures, supported on top of the absorptive layer.Type: GrantFiled: January 26, 2012Date of Patent: December 9, 2014Assignee: Massachusetts Institute of TechnologyInventors: Gleb M. Akselrod, Moungi G. Bawendi, Vladimir Bulovic, Jonathan R. Tischler, William A. Tisdale, Brian J. Walker
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Patent number: 8399939Abstract: A photoelectric device, such as a photodetector, can include a semiconductor nanowire electrostatically associated with a J-aggregate. The J-aggregate can facilitate absorption of a desired wavelength of light, and the semiconductor nanowire can facilitate charge transport. The color of light detected by the device can be chosen by selecting a J-aggregate with a corresponding peak absorption wavelength.Type: GrantFiled: December 3, 2010Date of Patent: March 19, 2013Assignee: Massachusetts Institute of TechnologyInventors: Brian J. Walker, August Dorn, Vladimir Bulovic, Moungi G. Bawendi
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Publication number: 20120188633Abstract: Disclosed are a device and a method for the design and fabrication of the device for enhancing the brightness of luminescent molecules, nanostructures, and thin films. The device includes a mirror, a dielectric medium or spacer, an absorptive layer, and a luminescent layer. The absorptive layer is a continuous thin film of a strongly absorbing organic or inorganic material. The luminescent layer may be a continuous luminescent thin film or an arrangement of isolated luminescent species, e.g., organic or metal-organic dye molecules, semiconductor quantum dots, or other semiconductor nanostructures, supported on top of the absorptive layer.Type: ApplicationFiled: January 26, 2012Publication date: July 26, 2012Inventors: Gleb M. Akselrod, Moungi G. Bawendi, Vladimir Bulovic, Jonathan R. Tischler, William A. Tisdale, Brian J. Walker
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Publication number: 20120138901Abstract: A photoelectric device, such as a photodetector, can include a semiconductor nanowire electrostatically associated with a J-aggregate. The J-aggregate can facilitate absorption of a desired wavelength of light, and the semiconductor nanowire can facilitate charge transport. The color of light detected by the device can be chosen by selecting a J-aggregate with a corresponding peak absorption wavelength.Type: ApplicationFiled: December 3, 2010Publication date: June 7, 2012Applicant: Massachusetts Institute of TechnologyInventors: Brian J. Walker, August Dorn, Vladimir Bulovic, Moungi G. Bawendi
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Patent number: 8086486Abstract: A method for managing information and rendering discounts in a billing system utilizes a rule-based engine. Customer records are processed with a rule-based accumulation engine to accumulate the data in a plurality of predetermined target accumulators. A plurality of target accumulators are processed with a rule-based discount engine to render discounts applicable to the customer.Type: GrantFiled: August 16, 2006Date of Patent: December 27, 2011Assignee: Qwest Communications International Inc.Inventors: Chase A. Hafner, William R. Mutschler, Brian J. Walker, David S. Joyce
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Publication number: 20110278536Abstract: A film can include a plurality of semiconductor nanocrystals and a J-aggregating material in solution. The film can exhibit 90% energy transfer efficiency from the J-aggregating material to the plurality of semiconductor nanocrystals. The film can exhibit photoluminescence that is enhanced at least 2.5 times over an equivalent film including the plurality of semiconductor nanocrystals alone when excited at 465 nm. The film can be contacted onto a substrate by spin casting.Type: ApplicationFiled: May 17, 2010Publication date: November 17, 2011Applicant: Massachusetts Institute of TechnologyInventors: Brian J. Walker, Moungi G. Bawendi, Vladimir Bulovic
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Patent number: 7817900Abstract: Video editing and video playback utilizing a render-ahead queue for storing rendered video frames. The render-ahead queue facilitates the smooth playback of video in forward and reverse timeline direction, avoiding video glitches that occur when video frames are rendered at a rate that is less than the timeline rate of the video file. Embodiments of the present invention also include the use of a graphics processing unit in conjunction with the render-ahead queue to further ensure smooth playback of video.Type: GrantFiled: June 30, 2005Date of Patent: October 19, 2010Assignee: Microsoft CorporationInventor: Brian J. Walker
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Patent number: 7447947Abstract: A system and method of creating trace information of an application. Trace data of the application is stored in a trace heap. Processing of stored trace data including a hard-coded string is deferred.Type: GrantFiled: June 3, 2005Date of Patent: November 4, 2008Assignee: Microsoft CorporationInventor: Brian J. Walker
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Patent number: 7383506Abstract: Pausing a graphic processing operation in order to continue processing a thread on a different desktop. When a graphic processing unit (GPU) is lost when a screen saver desktop is activated, the buffer containing the video frame that is currently being processed is discarded and a device is attempted to be created on the screen saver desktop which enables continued graphic processing.Type: GrantFiled: June 30, 2005Date of Patent: June 3, 2008Assignee: Microsoft CorporationInventor: Brian J. Walker
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Patent number: 6837918Abstract: A process and apparatus collects pigment nanoparticles by forming a vapor of a pigment that is solid at room temperature, the vapor of the pigment being provided in an inert gaseous carrying medium. At least some of the pigment is solidified within the gaseous stream. The gaseous stream and pigment material is moved in a gaseous carrying environment into or through a dry mechanical pumping system. While the particles are within the dry mechanical pumping system or after the nanoparticles have moved through the dry pumping system, the pigment material and nanoparticles are contacted with an inert liquid collecting medium.Type: GrantFiled: December 20, 2001Date of Patent: January 4, 2005Assignee: Aveka, Inc.Inventors: Gary A. Pozarnsky, William A. Hendrickson, Brian J. Walker
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Publication number: 20030116017Abstract: A process and apparatus collects pigment nanoparticles by forming a vapor of a pigment that is solid at room temperature, the vapor of the pigment being provided in an inert gaseous carrying medium. At least some of the pigment is solidified within the gaseous stream. The gaseous stream and pigment material is moved in a gaseous carrying environment into or through a dry mechanical pumping system. While the particles are within the dry mechanical pumping system or after the nanoparticles have moved through the dry pumping system, the pigment material and nanoparticles are contacted with an inert liquid collecting medium.Type: ApplicationFiled: December 20, 2001Publication date: June 26, 2003Applicant: Aveka, Inc.Inventors: Gary A. Pozarnsky, William A. Hendrickson, Brian J. Walker
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Patent number: 4495013Abstract: A plastic foam-forming mixture (31), e.g. a polyurethane or polyisocyanurate foam mix, deposited from one or more static dispensers (19) is metered through two spaced opposed members 14 and 18 forming between them a metering gap. At least one of the members is deformable in a controlled manner such that the profile of the metering gap can be variously defined. Reduces "crowning" of foam boards while permitting foam boards of different thicknesses to be made without having to replace metering bars.Type: GrantFiled: April 21, 1980Date of Patent: January 22, 1985Assignee: Imperial Chemical Industries PLCInventors: Brian J. Walker, Victor F. Hodgson