Patents Assigned to United States of America as represented by the Secretary of the Air Force
  • Patent number: 10994990
    Abstract: A method for making nanomaterials includes introducing into a catalyzed reactor vessel: a carrier gas at a first carrier gas feed rate; at least one carbon-based reactant at a first reactant feed rate; and optionally, at least one additive at a first additive feed rate. The reactor vessel is heated to a first temperature of at least 150° C., so that a portion of the carbon-based reactant within the reactor vessel reacts to form a plurality of nanomaterials. An exhaust gas is removed from the reactor and periodically sampled by exposing a paper web to the gas so that a sample of the nanomaterials from the gas are deposited on a region of the paper web for analysis. Based on this analysis, at least one reaction parameter selected from the group consisting of the first carrier gas feed rate, the first reactant feed rate, and first temperature may be adjusted.
    Type: Grant
    Filed: October 7, 2019
    Date of Patent: May 4, 2021
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventors: Rahul S. Rao, Benji Maruyama
  • Patent number: 10995037
    Abstract: The present disclosure includes a system and method for monitoring degradation of a high temperature composite component (HTC). The HTC is defined by a volume that includes a matrix material and a fiber formed from at least one of ceramic and carbon material. One or more electrical conductors are disposed within the volume and connected directly or indirectly to a monitoring system.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: May 4, 2021
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventor: Zlatomir D. Apostolov
  • Patent number: 10994840
    Abstract: A device for controlling thrust vectoring of a cyclorotor includes a control cam positionable relative to a drive shaft of a cyclorotor along each of a first axis and a second axis, where the drive shaft is rotatable about a third axis. The device may further include a frame having a plurality of sides, where the frame is disposed at least partly around the drive shaft of the cyclorotor, a first positioning assembly disposed on a first side of the frame, where the first positioning assembly is structurally configured to move the frame along the first axis, and a second positioning assembly disposed on a second side of the frame, where the second positioning assembly is engaged with the control cam and structurally configured to move the control cam relative to the frame along the second axis.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: May 4, 2021
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventor: Zachary H Adams
  • Patent number: 10989898
    Abstract: An optics system, a telescope system, and an optics system for a telescope are provided. The optics system may include a plurality of mirrors arranged around and centered about four orthogonal, rotational axes in a quad-axis Coudé optical path. The rotational axes are consecutively dependent on one another, and the plurality of mirrors direct light to a predetermined region irrespective of an orientation of an incident beam directed to the plurality of mirrors.
    Type: Grant
    Filed: May 28, 2020
    Date of Patent: April 27, 2021
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventor: Kevin S. Scheiman
  • Patent number: 10988437
    Abstract: The invention relates to bis(aniline) compounds containing multiple arylethynyl, alkylethynyl, ethynyl groups or their combinations, processes of making such compounds and materials comprising such compounds. Such, bis(aniline) compounds preferably comprise multiple phenylethynyl (PE) groups, i.e. 2-4 PE moieties. Such compounds are useful monomers for the preparation of polyimides, polyamides and poly(amide-imides) whose post-fabrication crosslinking chemistry (i.e. reaction temperature) can be controlled by the number of PE per repeat unit as well as finding utility in thermosetting matrix resins, 3D printable resins, and as high-carbon-content precursors to carbon-carbon composites.
    Type: Grant
    Filed: January 27, 2020
    Date of Patent: April 27, 2021
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventors: Loon-Seng Tan, Zhenning Yu
  • Patent number: 10985446
    Abstract: A method of making a reconfigurable antenna comprises the steps of applying one or more first layers of a prepreg laminate fabric to a form having a desired contour; applying a pattern corresponding to an antenna shape to the first layers of prepreg fabric; applying one or more second layers of the prepreg laminate fabric atop the pattern to form a laminate stack; curing the laminate stack; and removing the pattern to form channels in the antenna shape. The desired contour may be an aircraft skin panel or an airfoil panel. The pattern may be a polymer sheet with an applied cPLA antenna design. The curing step may be performed in a vacuum bag under the application of vacuum and heat. The removing step may be performed by heating the cured laminate stack to remove the pattern.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: April 20, 2021
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventors: Jeffery W Baur, Gregory H Huff, Darren J Hartl, Geoffrey J Frank, Hong Pan, Robyn L Bradford
  • Patent number: 10981878
    Abstract: Backfunctionalized imidazolinium salts and methods of synthesizing the same and NHC carbene-metal complexes therefrom. For backfunctionalized imidazolinium salts of the formula: Wherein R1 is selected from the group consisting of an ester group, an amide group, and an aromatic group; R2 is selected from the group consisting of hydrogen, an ester group, an amide group, and an aromatic group; R3 and R4 are each an aliphatic group; and X is an anion; the method comprises cyclization of a halogenated acrylate with Hünig's base in a solvent.
    Type: Grant
    Filed: August 22, 2019
    Date of Patent: April 20, 2021
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventors: Rusty L. Blanski, Robert H. Grubbs
  • Patent number: 10982943
    Abstract: A countersink go/no-go gauge is configured to aid a determination of whether a countersink aperture for a rivet is formed to a desired depth. The countersink go/no-go gauge includes a head having a depth defined between a top surface and a bottom surface and a shaft extending from the top surface of the head. The depth of the head is substantially equal to a desired depth of a countersink aperture. In some embodiments the go/no-go gauge includes tolerance features to provide a range for an acceptable countersink depth.
    Type: Grant
    Filed: November 5, 2018
    Date of Patent: April 20, 2021
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventor: Charles Meyer
  • Patent number: 10975032
    Abstract: The present invention relates to perfluoropyridine derived aromatic monomers and processes of making and using same. Such monomers can be easily and selectively functionalized and yet still synthesized by an efficient and environmentally friendly pathway. In addition, such monomers can be used to produce polymers with highly satisfactory char yields.
    Type: Grant
    Filed: July 28, 2020
    Date of Patent: April 13, 2021
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventors: Scott T. Iacono, Matthew B Houck
  • Patent number: 10975038
    Abstract: Backfunctionalized imidazolinium salts and methods of synthesizing the same and NHC carbene-metal complexes therefrom. For backfunctionalized imidazolinium salts of the formula: Wherein R1 is selected from the group consisting of an ester group, an amide group, and an aromatic group; R2 is selected from the group consisting of hydrogen, an ester group, an amide group, and an aromatic group; R3 and R4 are each an aliphatic group; and X is an anion; the method comprises cyclization of a halogenated acrylate with Hünig's base in a solvent.
    Type: Grant
    Filed: August 22, 2019
    Date of Patent: April 13, 2021
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventors: Rusty L. Blanski, Robert H. Grubbs
  • Patent number: 10974814
    Abstract: A wing, a method of controlling lift on a wing, and a system to produce lift on a wing are provided. The wing may include a fore-element, an aft-element, a pivotable linkage that operatively connects the aft-element leading edge to the fore-element trailing edge in a span-wise direction, and an actuator. The actuator may deflect the aft-element through a predetermined deflection angle about the pivotable linkage relative to the fore-element within less than or equal to two convective periods. The method may include deflecting a span-wise flap through the deflection angle in less than or equal to two convective periods to produce high lift. The system may include a sensor to detect an input and a controller to deflect the span-wise flap of the wing by the deflection angle in not more than two convective periods based on the received input signal.
    Type: Grant
    Filed: July 6, 2020
    Date of Patent: April 13, 2021
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventors: Michael V Ol, Alberto Medina
  • Patent number: 10969460
    Abstract: A method for generating radio tomographic images is provided. A plurality of transceivers positioned around a region to be imaged is divided into a plurality of pixels. A control apparatus is configured to cause each of the plurality of transceivers in turn to send a signal to each of the other transceivers. The control apparatus is further configured to determine an attenuation in the received signals, generate weighing, derivative, and attenuation matrices from the signals, group the pixels into a plurality of provinces, select each province in turn and solve for a change in attenuation in each of the pixels while setting the pixels in other provinces to zero, aggregate solutions from each of the provinces into a rough estimate, re-solve each province using the aggregated rough estimate, aggregate the re-solved solutions from each province into a refined estimate, and generate an image from the refined estimate.
    Type: Grant
    Filed: July 2, 2019
    Date of Patent: April 6, 2021
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventor: Richard K Martin
  • Patent number: 10968389
    Abstract: A method of treating a substrate comprises applying an electric field to a substrate comprising a layer of a dopant on at least one surface; applying a predetermined temperature to the substrate in the electric field; applying the electric field and the predetermined temperature for a time sufficient to induce migration of the dopant into the substrate to provide a doped substrate; and removing the electric field and returning the doped substrate to about room temperature, wherein the doped substrate is characterized in that a spectral laser output of the doped substrate exhibits a nominally single frequency having a linewidth less than about 5 nm. The substrate may be a glass material, a single crystal material, a poly-crystalline material, a ceramic material, or a semiconductor material, which may be optically transparent. Before treatment, the substrate may be an undoped substrate or a doped substrate.
    Type: Grant
    Filed: May 2, 2018
    Date of Patent: April 6, 2021
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventors: Gary Cook, Ronald W. Stites
  • Patent number: 10969752
    Abstract: Properties of a physical system are measured and used to update estimated states of the system in an iterative manner. At each iteration, a state update weight is assigned for each state and the states are predicted from previous estimated states. System states are predicted from prior estimates and then updated dependent upon the measurements and the state update weights to provide updated estimated states. In addition, a prior covariance matrix of state errors is updated dependent upon the state update weights to provide an estimation error covariance matrix that is consistent with the updated estimated states. The updated state may be equivalent to a weighted sum of a prior estimated state and an initial updated estimated state. The approach provides improvements to a variety of estimators, including least squares estimators and estimators such as the Extended, Schmidt and Unscented Kalman Filters and the Rao-Blackwellized Particle Filter.
    Type: Grant
    Filed: January 9, 2019
    Date of Patent: April 6, 2021
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventor: Kevin Brink
  • Patent number: 10955721
    Abstract: In accordance with various embodiments of the disclosed subject matter, a system, device and method for an electrically tunable wavelength selection filter comprising a wavelength selection filter portion having a plurality of alternating thin films of two dielectric materials with a thin film capacitor displacing one pair of alternating thin films, and an order sorting filter portion electrically isolated from but proximate the wavelength selection filter and having a plurality of alternating thin films of two dielectric materials where one of the dielectric materials exhibits a voltage-dependent refractive index. Independently controlling the capacitor charging voltage and the voltage across the order sorting filter enables selective transmission of narrow spectral lines across a desired frequency region.
    Type: Grant
    Filed: February 25, 2019
    Date of Patent: March 23, 2021
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventors: Jarrett H. Vella, John H. Goldsmith, Mohammad I. Vakil, John S. Derov
  • Patent number: 10955600
    Abstract: A spectrally-selective reflective optical film comprises at least two anisotropic layers, each of the layers having a phase retardation value and an optical axis orientation pattern within the layer; the optical axis orientation patterns exhibiting a discontinuity at the boundary of the at least two layers; and at least one substrate holding the film. At least a part of the anisotropic layers may be chiral. The materials comprising the anisotropic layers may be selected from liquid crystal polymers, azobenzene liquid crystal polymers, liquid crystals, azobenzene liquid crystals, polymer films with stressed birefringence, and combinations thereof. The materials comprising the anisotropic layers may be doped with at least one dopant from the list comprising nanorods, photorefractive nanoparticles, photovoltaic nanoparticles, lasing dyes, and combinations of thereof. The anisotropic layers may be transparent to infrared wavelengths.
    Type: Grant
    Filed: June 7, 2018
    Date of Patent: March 23, 2021
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventors: Dean R Evans, Ighodalo U Idehenre, Nelson V Tabiryan, Timothy J Bunning
  • Patent number: 10957789
    Abstract: Systems, methods and apparatus incorporating Gallium Nitride heterostructure (Alx,Iny)Ga1-x-y N-materials in flexible, strainable and wearable radio frequency devices. These devices include (Alx,Iny)Ga1-x-y N-based high-electron mobility transistors (HEMTs), which enable amplification of microwave radio frequencies from approximately 300 MHz to approximately 300 GHz for flexible and conformal wireless transmission.
    Type: Grant
    Filed: May 14, 2020
    Date of Patent: March 23, 2021
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventors: Nicholas R. Glavin, Kelson D. Chabak, Michael R. Snure
  • Patent number: 10948381
    Abstract: A wake generator for placement in a wind tunnel between a wind source and a test object for generating a predetermined wake pattern, comprising: a first frame member comprising a first track formed thereon, the first track having a rounded first side and a flat second side; a mounting plate disposed within a perimeter of the first track, the mounting plate rotatable relative to the first frame member about a first axis; and a plurality of bars slidably engaged to the mounting plate and structurally configured to traverse along the first track when the mounting plate is rotated about the first axis, where each of the plurality of bars comprises a pivotal connection allowing each of the plurality of bars to pivot about the pivotal connection when traversing along the first track, wherein the plurality of bars are parallel to the track on the second side of the wake generator.
    Type: Grant
    Filed: April 6, 2020
    Date of Patent: March 16, 2021
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventors: Carl Pickl, James L. Rutledge, Marc D. Polanka, Brian Crabtree, Christopher Harkless
  • Patent number: 10947642
    Abstract: The present invention relates to single crystalline Cs2U4O12, hydrothermal growth processes of making such single crystals and methods of using such single crystals. In particular, Applicants disclose single crystalline Cs2U4O12 having a P21/c structure and a process of making and using same. Unlike other single crystalline Cs2U4O12 structures the P21/c structure has a different set of atomic coordinates which gives a different framework which in turn provides the altered performance of such single crystals.
    Type: Grant
    Filed: August 21, 2019
    Date of Patent: March 16, 2021
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventors: Thomas A. Bowen, Eric J. Plummer, James M. Mann
  • Patent number: 10942313
    Abstract: A passive microscopic Fabry-Pérot Interferometer (FPI) sensor an optical fiber a three-dimensional microscopic optical structure formed on a cleaved tip of an optical fighter that reflects a light signal back through the optical fiber. The reflected light is altered by refractive index changes in the three-dimensional structure that is subject to at least one of: (i) thermal radiation; and (ii) volatile organic compounds.
    Type: Grant
    Filed: February 10, 2020
    Date of Patent: March 9, 2021
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventors: Hengky Chandrahalim, Jonathan Smith