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).

  • Patent number: 9841544
    Abstract: 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: Grant
    Filed: December 8, 2014
    Date of Patent: December 12, 2017
    Assignee: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    Inventors: Gleb M. Akselrod, Moungi G. Bawendi, Vladimir Bulovic, Jonathan R. Tischler, William A. Tisdale, Brian J. Walker
  • Publication number: 20150153493
    Abstract: 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: Application
    Filed: December 8, 2014
    Publication date: June 4, 2015
    Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    Inventors: Gleb M. Akselrod, Moungi G. Bawendi, Vladimir Bulovic, Jonathan R. Tischler, William A. Tisdale, Brian J. Walker
  • Patent number: 8908261
    Abstract: 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: Grant
    Filed: January 26, 2012
    Date of Patent: December 9, 2014
    Assignee: Massachusetts Institute of Technology
    Inventors: Gleb M. Akselrod, Moungi G. Bawendi, Vladimir Bulovic, Jonathan R. Tischler, William A. Tisdale, Brian J. Walker
  • Patent number: 8399939
    Abstract: 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: Grant
    Filed: December 3, 2010
    Date of Patent: March 19, 2013
    Assignee: Massachusetts Institute of Technology
    Inventors: Brian J. Walker, August Dorn, Vladimir Bulovic, Moungi G. Bawendi
  • Publication number: 20120188633
    Abstract: 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: Application
    Filed: January 26, 2012
    Publication date: July 26, 2012
    Inventors: Gleb M. Akselrod, Moungi G. Bawendi, Vladimir Bulovic, Jonathan R. Tischler, William A. Tisdale, Brian J. Walker
  • Publication number: 20120138901
    Abstract: 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: Application
    Filed: December 3, 2010
    Publication date: June 7, 2012
    Applicant: Massachusetts Institute of Technology
    Inventors: Brian J. Walker, August Dorn, Vladimir Bulovic, Moungi G. Bawendi
  • Patent number: 8086486
    Abstract: 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: Grant
    Filed: August 16, 2006
    Date of Patent: December 27, 2011
    Assignee: Qwest Communications International Inc.
    Inventors: Chase A. Hafner, William R. Mutschler, Brian J. Walker, David S. Joyce
  • Publication number: 20110278536
    Abstract: 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: Application
    Filed: May 17, 2010
    Publication date: November 17, 2011
    Applicant: Massachusetts Institute of Technology
    Inventors: Brian J. Walker, Moungi G. Bawendi, Vladimir Bulovic
  • Patent number: 7817900
    Abstract: 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: Grant
    Filed: June 30, 2005
    Date of Patent: October 19, 2010
    Assignee: Microsoft Corporation
    Inventor: Brian J. Walker
  • Patent number: 7447947
    Abstract: 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: Grant
    Filed: June 3, 2005
    Date of Patent: November 4, 2008
    Assignee: Microsoft Corporation
    Inventor: Brian J. Walker
  • Patent number: 7383506
    Abstract: 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: Grant
    Filed: June 30, 2005
    Date of Patent: June 3, 2008
    Assignee: Microsoft Corporation
    Inventor: Brian J. Walker
  • Patent number: 6837918
    Abstract: 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: Grant
    Filed: December 20, 2001
    Date of Patent: January 4, 2005
    Assignee: Aveka, Inc.
    Inventors: Gary A. Pozarnsky, William A. Hendrickson, Brian J. Walker
  • Publication number: 20030116017
    Abstract: 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: Application
    Filed: December 20, 2001
    Publication date: June 26, 2003
    Applicant: Aveka, Inc.
    Inventors: Gary A. Pozarnsky, William A. Hendrickson, Brian J. Walker
  • Patent number: 4495013
    Abstract: 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: Grant
    Filed: April 21, 1980
    Date of Patent: January 22, 1985
    Assignee: Imperial Chemical Industries PLC
    Inventors: Brian J. Walker, Victor F. Hodgson