Patents by Inventor Anastasios John Hart

Anastasios John Hart 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).

  • Publication number: 20210364398
    Abstract: A device for collecting contaminants from water samples is provided. The device includes a solid sorbent that collects and stores the contaminants from water samples. The solid sorbent is configured to allow for the preservation of the stored contaminants. The concentrations of the contaminants in the water samples are determined via analysis of the solid sorbent or via elution of the stored contaminants from the sorbent and analysis of the eluate solution.
    Type: Application
    Filed: August 3, 2021
    Publication date: November 25, 2021
    Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    Inventors: Emily Hanhauser, Michael Bono, Anastasios John Hart, Rohit Karnik, Xiaoyuan Ren, Chintan Vaishnav
  • Publication number: 20210300009
    Abstract: The present invention provides methods for uniform growth of nanostructures such as nanotubes (e.g., carbon nanotubes) on the surface of a substrate, wherein the long axes of the nanostructures may be substantially aligned. The nanostructures may be further processed for use in various applications, such as composite materials. For example, a set of aligned nanostructures may be formed and transferred, either in bulk or to another surface, to another material to enhance the properties of the material. In some cases, the nanostructures may enhance the mechanical properties of a material, for example, providing mechanical reinforcement at an interface between two materials or plies. In some cases, the nanostructures may enhance thermal and/or electronic properties of a material. The present invention also provides systems and methods for growth of nanostructures, including batch processes and continuous processes.
    Type: Application
    Filed: February 1, 2021
    Publication date: September 30, 2021
    Applicant: Massachusetts Institute of Technology
    Inventors: Brian L. Wardle, Anastasios John Hart, Enrique J. Garcia, Alexander H. Slocum
  • Patent number: 11131609
    Abstract: A device for collecting contaminants from water samples is provided. The device includes a solid sorbent that collects and stores the contaminants from water samples. The solid sorbent is configured to allow for the preservation of the stored contaminants. The concentrations of the contaminants in the water samples are determined via analysis of the solid sorbent or via elution of the stored contaminants from the sorbent and analysis of the eluate solution.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: September 28, 2021
    Assignee: Massachusetts Institute of Technology
    Inventors: Emily Hanhauser, Michael Bono, Anastasios John Hart, Rohit Karnik, Xiaoyuan Ren, Chintan Vaishnav
  • Publication number: 20210283693
    Abstract: The devices, systems, and methods of the present disclosure are directed to powder spreading and binder distribution techniques for consistent and rapid layer-by-layer fabrication of three-dimensional objects formed through binder jetting. For example, a powder may be spread to form a layer along a volume defined by a powder box, a binder may be deposited along the layer to form a layer of a three-dimensional object, and the direction of spreading the layer and depositing the binder may be in a first direction and in a second direction, different from the first direction, thus facilitating rapid formation of the three-dimensional object with each passage of the print carriage over the volume. Powder delivery, powder spreading, thermal energy delivery, and combinations thereof, may facilitate consistently achieving quality standards as the rate of fabrication of the three-dimensional object is increased.
    Type: Application
    Filed: April 20, 2018
    Publication date: September 16, 2021
    Applicant: Desktop Metal, Inc.
    Inventors: Jonah Myerberg, Ricardo Fulop, Brett Schuster, Emanuel Michael Sachs, Paul A. Hoisington, Anastasios John Hart, Keith Vaillancourt, Steven Garrant, George Hudelson
  • Publication number: 20210170490
    Abstract: Methods and apparatuses for additive manufacturing are described. A method for additive manufacturing may include exposing a layer of material on a build surface to one or more projections of laser energy including at least one line laser having a substantially linear shape. The intensity of the line laser may be modulated so as to cause fusion of the layer of material according to a desired pattern as the one or more projections of laser energy are scanned across the build surface.
    Type: Application
    Filed: January 25, 2021
    Publication date: June 10, 2021
    Applicant: VulcanForms Inc.
    Inventors: Martin C. Feldmann, Anastasios John Hart, Knute Svenson, Andrey Vyatskikh
  • Publication number: 20210109003
    Abstract: The present disclosure is directed to rheometric fixtures for making rheological measurements of yield stress fluids. In some embodiments, the fixture can be an improvement of a typical vane by having the ability to create a more homogeneous shear profile in a test material, e.g., a yield stress fluid. These vane fixtures having fractal-like cross-sectional structures enable robust rheological measurements of the properties of yield stress fluids due to several outer contact edges that lead to increased kinematic homogeneity at the point of yielding and beyond. The branching structure of the fractal-like fixtures can alter the shape of a wetted perimeter of the fixture while minimizing an area thereof to allow the fixture to be inserted into fluids with less disturbance. In some embodiments, a cup with a ribbed inner surface can be used to hold the sample fluid and disassembles for ease of cleaning following completion of the measurement.
    Type: Application
    Filed: October 15, 2020
    Publication date: April 15, 2021
    Inventors: Crystal Elaine Owens, Gareth H. McKinley, Anastasios John Hart
  • Patent number: 10919090
    Abstract: Methods and apparatuses for additive manufacturing are described. A method for additive manufacturing may include exposing a layer of material on a build surface to one or more projections of laser energy including at least one line laser having a substantially linear shape. The intensity of the line laser may be modulated so as to cause fusion of the layer of material according to a desired pattern as the one or more projections of laser energy are scanned across the build surface.
    Type: Grant
    Filed: July 18, 2016
    Date of Patent: February 16, 2021
    Assignee: VulcanForms Inc.
    Inventors: Martin C. Feldmann, Anastasios John Hart, Knute Svenson, Andrey Vyatskikh
  • Patent number: 10919158
    Abstract: Controllable electromechanical adhesive devices including three-dimensional dielectrically-coated microstructures that are mechanically compliant are provided. The microstructures can be controlled to provide tunable electromechanical surface adhesion, allowing for dexterous gripping of microscale and/or macroscale objects. For example, the devices can tune the surface adhesion strength of one or more microstructures without complex mechanical actuation in a wide range of on/off ratios with low voltage. The devices can be configured as a force sensor capable of providing tactile feedback for determining the load applied against the microstructures by the surface of an object. For example, the devices can provide output indicative of changes in an electrical property of one or more microstructures for determining the applied load of an object. The devices can be pixelated or otherwise configured to provide localized force sensing and/or surface adhesion.
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: February 16, 2021
    Assignee: Massachusetts Institute of Technology
    Inventors: Anastasios John Hart, Sanha Kim
  • Patent number: 10906285
    Abstract: The present invention provides methods for uniform growth of nanostructures such as nanotubes (e.g., carbon nanotubes) on the surface of a substrate, wherein the long axes of the nanostructures may be substantially aligned. The nanostructures may be further processed for use in various applications, such as composite materials. For example, a set of aligned nanostructures may be formed and transferred, either in bulk or to another surface, to another material to enhance the properties of the material. In some cases, the nanostructures may enhance the mechanical properties of a material, for example, providing mechanical reinforcement at an interface between two materials or plies. In some cases, the nanostructures may enhance thermal and/or electronic properties of a material. The present invention also provides systems and methods for growth of nanostructures, including batch processes and continuous processes.
    Type: Grant
    Filed: July 3, 2019
    Date of Patent: February 2, 2021
    Assignee: Massachusetts Institute of Technology
    Inventors: Brian L. Wardle, Anastasios John Hart, Enrique J. Garcia, Alexander H. Slocum
  • Publication number: 20200362236
    Abstract: Optical materials and associated systems and methods are generally provided.
    Type: Application
    Filed: November 28, 2017
    Publication date: November 19, 2020
    Applicant: Massachusetts Institute of Technology
    Inventors: Kehang Cui, Anastasios John Hart
  • Patent number: 10828878
    Abstract: Systems, devices, and related methods are disclosed for electromechanical transfer printing of 2D materials disposed on one substrate to another. The printing device can be configured to transfer a 2D material from a source substrate to the target substrate by applying a combination of mechanical and electrostatic forces to facilitate electromechanical adhesion between the 2D material layer and the target substrate. Some embodiments of the printing device can effect direct transfer printing of a 2D material from a source substrate to a target substrate without the use of etchants and adhesives.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: November 10, 2020
    Assignee: Massachusetts Institute of Technology
    Inventors: Sanha Kim, Anastasios John Hart, Piran Ravichandran Kidambi, Dhanushkodi Durai Mariappan
  • Publication number: 20200346476
    Abstract: Methods and apparatus for contacting printing via electrostatic force. In one example, an apparatus for contact printing using an ink includes a substrate, a conductive layer disposed on the substrate, and a group of microstructures disposed on the conductive layer. Each microstructure includes a group of conductive porous medium extending from the conductive layer. The apparatus also includes a dielectric layer conformally disposed on the microstructures and configured to electrically insulate the microstructures from the ink during use. The conductive layer is configured to apply a voltage on the group of microstructures to facilitate the loading and dispensing of ink.
    Type: Application
    Filed: January 5, 2018
    Publication date: November 5, 2020
    Applicant: Massachusetts Institute of Technology
    Inventors: Anastasios John Hart, Sanha Kim
  • Patent number: 10814348
    Abstract: A particle can be discretely ejected from a orifice.
    Type: Grant
    Filed: April 9, 2018
    Date of Patent: October 27, 2020
    Assignees: MASSACHUSETTS INSTITUTE OF TECHNOLOGY, UNIVERSITY OF MICHIGAN
    Inventors: Anastasios John Hart, Justin Douglas Beroz, Homayoon Maghsoodi
  • Publication number: 20200298475
    Abstract: According to some aspects, techniques are provided for fabricating sinterable metallic parts through the application of directed energy to a build material. In particular, applying energy to a build material comprising a polymer mixed with a metal powder may cause the polymer to form a cohesive structure with the metal powder. As a result, the polymer acts as a “glue” to produce a metallic green part without local melting of the metal. The green part may subsequently be sintered to remove the polymer and produce a fully dense metal part. Optionally, a step of debinding may also be performed prior to, or simultaneously with, sintering.
    Type: Application
    Filed: March 20, 2020
    Publication date: September 24, 2020
    Applicant: Desktop Metal, Inc.
    Inventors: Jonah Samuel Myerberg, Anastasios John Hart
  • Publication number: 20200254718
    Abstract: An apparatus for manipulating an object includes a substrate, an electrically conductive layer disposed on the substrate, and a porous medium comprising an electrically conductive material. The apparatus also includes a dielectric layer conformally disposed on the porous medium to insulate the porous medium from the object during use. The porosity of the porous medium is about 90% or greater. The adhesive strength of the porous medium is about 1 kPa or lower, and the modulus of the porous medium is about 1 GPa or lower.
    Type: Application
    Filed: January 5, 2018
    Publication date: August 13, 2020
    Inventors: Sanha Kim, Anastasios John Hart, Kevin Turner, Yijie Jiang
  • Publication number: 20200238604
    Abstract: Wearable and implantable devices that are used to support human anatomy and are formed using additive manufacturing are provided. Systems and methods for performing additive manufacturing allow for the formulation of a mesh material that has localized stiffness and slack in regions to best serve the needs of the patient. For example, regions of the mesh material can be designed to rigidly support portions of human anatomy, such as injured tissue, while regions of the mesh material adjacent to the injured tissue can be designed to closely mimic movement of the relevant human anatomy. For example, the mesh material can be formed in a manner such that it does not fold in those regions, and therefore is not obtrusive. The present disclosure allows for control of toolpaths when printing fibers used to form the devices. Other devices, as well as systems and methods for creating the same, are also provided.
    Type: Application
    Filed: January 27, 2020
    Publication date: July 30, 2020
    Inventors: Anastasios John Hart, Sebastian William Pattinson, Meghan Elizabeth Huber, Jongwoo Lee, Ricardo Roberts
  • Patent number: 10696034
    Abstract: Methods, systems, and devices for extrusion-based three-dimensional printing are provided. The methods, systems, and devices allow for the printing materials such as fabrics, clothing, and wearable and/or implantable devices. A number of different enhancements are provided that allow for this improved form of three-dimensional printing, including: (1) printing using a polymer (e.g., cellulose acetate) dissolved in a solvent (e.g., acetone); (2) selectively bonding portions of a deposited filament onto one or more surfaces and/or one or more previously deposited filaments; (3) using particular toolpaths to create a fabric or similar material by creating a woven pattern; and (4) printing across multiple layers even when previous layers are not complete. Other aspects of the present disclosure, including other enhancements and various printer configurations, are also provided.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: June 30, 2020
    Assignee: Massachusetts Institute of Technology
    Inventors: Sebastian William Pattinson, Anastasios John Hart
  • Publication number: 20200189137
    Abstract: A novel cutting-edge structure and method and apparatus for manufacturing the cutting-edge structure is provided. The cutting-edge structure is comprised of naturally derived or renewable material at greater than 50% by volume fraction. In one embodiment, the naturally derived material is a cellulose nanostructure such as a cellulose nanocrystal. The cellulose nanocrystal is processed using a base or mold structure to provide a cutting edge of any shape such as linear or circular edge structures. The process includes dual cure steps to produce an optimal cutting-edge structure without shrinkage. The formed cutting-edge structure can be utilized as a razor blade as it is formed with very sharp tip and edge suitable for cutting hair. The base structure can form one or more cutting-edge structures simultaneously.
    Type: Application
    Filed: December 12, 2019
    Publication date: June 18, 2020
    Inventors: Neville Sonnenberg, Abhinav Rao, Anastasios John Hart, Paul Kitchen
  • Publication number: 20200189138
    Abstract: A novel cutting-edge structure and method and apparatus for manufacturing the cutting-edge structure is provided. The cutting-edge structure is comprised of naturally derived or renewable material at greater than 50% by volume fraction. In one embodiment, the naturally derived material is a cellulose nanostructure such as a cellulose nanocrystal. The cellulose nanocrystal is processed using a base or mold structure to provide a cutting edge of any shape such as linear or circular edge structures. The process includes dual cure steps to produce an optimal cutting-edge structure without shrinkage. The formed cutting-edge structure can be utilized as a razor blade as it is formed with very sharp tip and edge suitable for cutting hair. The base structure can form one or more cutting-edge structures simultaneously.
    Type: Application
    Filed: December 12, 2019
    Publication date: June 18, 2020
    Inventors: Neville Sonnenberg, Abhinav Rao, Anastasios John Hart, Paul Kitchen
  • Publication number: 20200190268
    Abstract: Methods, systems, and devices for synthesis, mechanics, and direct-write additive manufacturing of cellulose nanocrystal (CNC) composites that exhibit characteristics of high-performance structural materials are provided. The methods, systems, and devices allow for formulation, processing, and bulk fabrication of highly-filled nanocomposites having high hardness and toughness. In some embodiments, a precursor that includes a nanomaterial and one or more monomers is formulated and passed through an extruder to form a physical gel. The physical gel can undergo a dual cure process that includes an initial UV cure and a subsequent thermal cure to crosslink the polymer with the CNC to form the highly-filled nanocomposite. The CNC composite can then be used in the manufacturing process. In some embodiments, the interfacial mechanics and fracture characteristics of the composite can be tuned to improve the mechanical properties of the composite.
    Type: Application
    Filed: December 12, 2019
    Publication date: June 18, 2020
    Inventors: Abhinav Rao, Anastasios John Hart