Patents by Inventor James L. Hedrick, III

James L. Hedrick, III 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: 20230040818
    Abstract: Methods and apparatus comprising a dewetting phase and a polymerization liquid that are immiscible, and can be used for the formation of three-dimensional objects, wherein the method does not require a dead zone. Additionally, methods and apparatus that employ an optically transparent cooling apparatus to mitigate heat generated during the fabrication process, and the use of a mobile phase to provide a shearing interface to reduce interfacial adhesive forces.
    Type: Application
    Filed: September 6, 2022
    Publication date: February 9, 2023
    Inventors: Chad A. Mirkin, David A. Walker, James L. Hedrick, III
  • Patent number: 11465339
    Abstract: Methods and apparatus comprising a dewetting phase and a polymerization liquid that are immiscible, and can be used for the formation of three-dimensional objects, wherein the method does not require a dead zone. Additionally, methods and apparatus that employ an optically transparent cooling apparatus to mitigate heat generated during the fabrication process, and the use of a mobile phase to provide a shearing interface to reduce interfacial adhesive forces.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: October 11, 2022
    Assignee: NORTHWESTERN UNIVERSITY
    Inventors: Chad A. Mirkin, David A. Walker, James L. Hedrick, III
  • Patent number: 11415877
    Abstract: Disclosed herein are methods of using a fluoro oil mask to prepare a beam pen lithography pen array.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: August 16, 2022
    Assignee: NORTHWESTERN UNIVERSITY
    Inventors: Chad A. Mirkin, David A. Walker, James L. Hedrick, III
  • Publication number: 20220193988
    Abstract: Methods and apparatus comprising a dewetting material and a polymerization liquid that are immiscible and dewetting, and can be used for the formation of three-dimensional objects, wherein the method does not require a dead zone. Additionally, methods and apparatus that employ the use of a flowing dewetting material to provide a shearing interface to reduce interfacial adhesive forces.
    Type: Application
    Filed: March 9, 2020
    Publication date: June 23, 2022
    Inventors: David A. Walker, James L. Hedrick, III, Chad A. Mirkin
  • Patent number: 11292187
    Abstract: Methods and apparatus comprising a dewetting phase and a polymerization liquid that are immiscible, and can be used for the formation of three-dimensional objects, wherein the method does not require a dead zone. Additionally, methods and apparatus that employ an optically transparent cooling apparatus to mitigate heat generated during the fabrication process, and the use of a mobile phase to provide a shearing interface to reduce interfacial adhesive forces.
    Type: Grant
    Filed: October 30, 2020
    Date of Patent: April 5, 2022
    Assignee: NORTHWESTERN UNIVERSITY
    Inventors: Chad A. Mirkin, David A. Walker, James L. Hedrick, III
  • Publication number: 20210114288
    Abstract: Methods and apparatus comprising a dewetting phase and a polymerization liquid that are immiscible, and can be used for the formation of three-dimensional objects, wherein the method does not require a dead zone. Additionally, methods and apparatus that employ an optically transparent cooling apparatus to mitigate heat generated during the fabrication process, and the use of a mobile phase to provide a shearing interface to reduce interfacial adhesive forces.
    Type: Application
    Filed: October 30, 2020
    Publication date: April 22, 2021
    Inventors: Chad A. Mirkin, David A. Walker, James L. Hedrick, III
  • Publication number: 20190384161
    Abstract: Disclosed herein are methods of using a fluoro oil mask to prepare a beam pen lithography pen array.
    Type: Application
    Filed: December 7, 2017
    Publication date: December 19, 2019
    Inventors: Chad A. Mirkin, David A. Walker, James L. Hedrick, III
  • Publication number: 20190160733
    Abstract: Methods and apparatus comprising a dewetting phase and a polymerization liquid that are immiscible, and can be used for the formation of three-dimensional objects, wherein the method does not require a dead zone. Additionally, methods and apparatus that employ an optically transparent cooling apparatus to mitigate heat generated during the fabrication process, and the use of a mobile phase to provide a shearing interface to reduce interfacial adhesive forces.
    Type: Application
    Filed: May 31, 2017
    Publication date: May 30, 2019
    Inventors: Chad A. Mirkin, David A. Walker, James L. Hedrick, III
  • Patent number: 10203598
    Abstract: The disclosure provides a method of inking a polymer pen lithography tip array (“PPL tip array”), including applying an ink composition to a PPL tip array using at least two spray applicators to deposit the ink as a non-uniform ink layer. The disclosure further provides a method of depositing at least two ink compositions on PPL tip array, including applying a first ink to a first defined area using a first spray applicator, and applying a second ink to a second defined area using a second spray applicator. The disclosure further provides a method of scaling a linear ink composition gradient provided by at least two spray applicators to a PPL tip array having a length, L, including positioning the spray applicators at a distance of about 5.0 L to about 8.0 L relative to the surface of the PPL tip array, positioning the spray applicators at a distance of about 0.5 L to about 3.0 L relative to each other, and applying an ink composition.
    Type: Grant
    Filed: October 17, 2016
    Date of Patent: February 12, 2019
    Assignee: NORTHWESTERN UNIVERSITY
    Inventors: Chad A. Mirkin, Keith A. Brown, James L. Hedrick, III
  • Patent number: 9971239
    Abstract: Provided here are hard transparent polymer pen arrays, methods of printing indicia using the same, and methods of preparing the same.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: May 15, 2018
    Assignee: NORTHWESTERN UNIVERSITY
    Inventors: Chad A. Mirkin, Keith A. Brown, James L. Hedrick, III
  • Publication number: 20170115558
    Abstract: Provided here are hard transparent polymer pen arrays, methods of printing indicia using the same, and methods of preparing the same.
    Type: Application
    Filed: October 21, 2016
    Publication date: April 27, 2017
    Inventors: Chad A. Mirkin, Keith A. Brown, James L. Hedrick, III
  • Publication number: 20170108772
    Abstract: The disclosure provides a method of inking a polymer pen lithography tip array (“PPL tip array”), including applying an ink composition to a PPL tip array using at least two spray applicators to deposit the ink as a non-uniform ink layer. The disclosure further provides a method of depositing at least two ink compositions on PPL tip array, including applying a first ink to a first defined area using a first spray applicator, and applying a second ink to a second defined area using a second spray applicator. The disclosure further provides a method of scaling a linear ink composition gradient provided by at least two spray applicators to a PPL tip array having a length, L, including positioning the spray applicators at a distance of about 5.0 L to about 8.0 L relative to the surface of the PPL tip array, positioning the spray applicators at a distance of about 0.5 L to about 3.0 L relative to each other, and applying an ink composition.
    Type: Application
    Filed: October 17, 2016
    Publication date: April 20, 2017
    Applicant: NORTHWESTERN UNIVERSITY
    Inventors: Chad A. Mirkin, Keith A. Brown, James L. Hedrick, III