Massachusetts Institute of Technology

University of Michigan

Desktop Metal, Inc.

The Gillette Company

Vulcanforms Inc.

Woods Hole Oceanographic' Institution

Guardian Glass, LLC

Nanocomp Technologies, Inc.

Anastasios John Hart

Jonah Samuel Myerberg

Ricardo Fulop

Richard Remo Fontana

Michael Andrew Gibson

Yet-Ming Chiang

Christopher Allan Schuh

Brian Lee Wardle

Matthew David Verminski

Enrique J Garcia

Alexander H Slocum, Jr

Sanha Kim

Ryan Wade Penny

Justin Douglas Beroz

Alexander H Slocum

Martin C Feldmann

Abhinav Rao

Neville Sonnenberg

Rohit Nandkumar Karnik

Ricardo Chin

Chintan Vaishnav

Paul Kitchen

Knute Svenson

Andrey Vyatskikh

Emily Hanhauser

Michael Bono

Emanuel Michael Sachs

Karen K Gleason

Peter Alfons Schmitt

Jamison Go

Aaron Preston

Christopher M Reddy

Nihan Tuncer

Jay Tobia

Christopher Ryan Oliver

Desiree L Plata

Sebastian William Pattinson

Hossein Sojoudi

Jieyuan Wu

Chad Robert Archer

Adam Gregory Stevens

Crystal Elaine Owens

Sameh Tawfick

Erik Polsen

Eric R Meshot

Homayoon Maghsoodi

Xiaoyuan Ren

Vijayen S Veerasamy

Paul A Hoisington

David S Lashmore

Nicholas Alexander Kotov

Gareth H McKinley

George Hudelson

Kevin T Turner

Keith Roy Vaillancourt

Yijie Jiang

Piran Ravichandran Kidambi

Brett Schuster

Donghyun Kim

Shorya Awtar

Meghan Elizabeth Huber

Alexander Henry Slocum

Philip M Gschwend

Robert Braden

John Welch

Cécile A C Chazot

Jonathan S Gibbs

Stuart P Baker

Alvin Thong Lip Tan

Jongwoo Lee

Ricardo Roberts

Sydney B Beasley

Steven Garrant

Daniel Quinn McNerny

Philip S Gschwend

Jacob Rothman

Adrian Samsel

Michael DeVolder

Davor Copic

Kristine A Bunker

Kyle N Hounsell

Diego S Saito

Hulya Cebeci

Dhanushkodi Durai Mariappan

Javier Canavati Leal

Brett Michael Perry

Neil Hasmukh Patel

Justin Lefevre

Lucas Carolus Van Laake

Support structures are used in certain additive fabrication processes to permit fabrication of a greater range of object geometries. For additive fabrication processes with materials that are subsequently sintered into a final part, an interface layer is formed between the object and support in order to inhibit bonding between adjacent surfaces of the support structure and the object during sintering.

Interface layers for removable supports

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.

Additive manufacturing by spatially controlled material fusion

Systems, devices, and methods for additive manufacturing are provided that allow for components being manufactured to be assessed during the printing process. As a result, changes to a print plan can be considered, made, and implemented during the printing process. More particularly, in exemplary embodiments, a spectrometer is operated while a component is being printed to measure one or more parameters associated with one or more layers of the component being printed. The measured parameter(s) are then relied upon to determine if any changes are needed to the way printing is occurring, and if such changes are desirable, the system is able to implement such changes during the printing process. By way of non-limiting examples, printed material in one or more layers may be reheated to alter the printed component, such as to remove defects identified by the spectrometer data. A variety of systems, devices, and methods for performing real-time sensing and control of an additive manufacturing process are also provided.

Sensing and control of additive manufacturing processes

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.

Additive fabrication of sinterable metallic parts via application of directed energy

Forming an interface layer for removable support

Systems and methods for making it easier to remove support structures printed in conjunction with printing an object using stereolithographic additive manufacturing are disclosed. In some exemplary embodiments, one or more interfaces between the printed object and the support structures are modulated to allow for easy separation between them, in some instances even when the object and support structures are made from the same material. Various modulation techniques are disclosed, including adjusting an intensity of exposure to light at interfaces between the object and support structures, and using two materials where one material cures at two wavelength ranges and the other material only cures at one of the two wavelength ranges. Other systems and methods that allow for easy separation of part and support structure are also described.

Systems and methods for support removal in stereolithographic additive manufacturing

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.

Continuous process for the production of nanostructures including nanotubes

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.

Cutting-edge structures and method of manufacturing cutting-edge structures

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.

System and method for preservation, transport, and analysis of water samples

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.

Systems, devices, and methods for rheological measurement of yield stress fluids using fractal-like fixtures

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.

Multi-directional binder jetting additive manufacturing

Systems, devices, and methods for detecting contamination (e.g., bacteria) in fluid are provided. The systems, devices, and methods allow for filtering a fluid sample using a filter to capture and concentrate cells (e.g., bacteria) to detect electrochemical properties thereof. The cells can be exposed to a reagent that diffuses into the cells to produce a product of interest that can be used in analysis of the fluid sample. The product of interest can diffuse out of the filter into a fluid storage component for detection and analysis by an analysis component. After the sampling is completed, the filter can be detached and discarded. Other aspects of the present disclosure, including enhancements and various systems and methods for concentrating cells and analyzing the same, are also provided.

Systems, devices, and methods for point-of-use testing for fluid contamination

Growing community of inventors

Waban, MA, United States of America

Anastasios John Hart