Patents by Inventor Robin Papachristopoulos

Robin Papachristopoulos 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: 20240157627
    Abstract: Radiation curable compositions for additive fabrication processes, the components cured therefrom, and their use in particle image velocimetry testing methods are described and claimed herein. Such compositions include compounds which induce free-radical polymerization, optionally compounds which induce cationic polymerization, a filler constituent, and a light absorbing component, wherein the compositions are configured to possess certain absorbance coefficients at wavelengths commonly utilized in particle image velocimetry testing. In another embodiment, the compositions include a fluorantimony-modified compound. Such compositions may be used in particle imaging velocimetry testing methods, wherein the test object utilized is created via additive fabrication and is of a substantially homogeneous construction.
    Type: Application
    Filed: December 21, 2023
    Publication date: May 16, 2024
    Inventors: Kangtai REN, Robin Papachristopoulos
  • Patent number: 11878459
    Abstract: Radiation curable compositions for additive fabrication processes, the components cured therefrom, and their use in particle image velocimetry testing methods are described and claimed herein. Such compositions include compounds which induce free-radical polymerization, optionally compounds which induce cationic polymerization, a filler constituent, and a light absorbing component, wherein the compositions are configured to possess certain absorbance values at wavelengths commonly utilized in particle image velocimetry testing. In another embodiment, the compositions include a fluoroantimony-modified compound. Such compositions may be used in particle imaging velocimetry testing methods, wherein the test object utilized is created via additive fabrication and is of a substantially homogeneous construction.
    Type: Grant
    Filed: October 15, 2021
    Date of Patent: January 23, 2024
    Assignee: STRATASYS, INC.
    Inventors: Kangtai Ren, Robin Papachristopoulos
  • Publication number: 20220033553
    Abstract: Radiation curable compositions for additive fabrication processes, the components cured therefrom, and their use in particle image velocimetry testing methods are described and claimed herein. Such compositions include compounds which induce free-radical polymerization, optionally compounds which induce cationic polymerization, a filler constituent, and a light absorbing component, wherein the compositions are configured to possess certain absorbance values at wavelengths commonly utilized in particle image velocimetry testing. In another embodiment, the compositions include a fluoroantimony-modified compound. Such compositions may be used in particle imaging velocimetry testing methods, wherein the test object utilized is created via additive fabrication and is of a substantially homogeneous construction.
    Type: Application
    Filed: October 15, 2021
    Publication date: February 3, 2022
    Inventors: Kangtai REN, Robin PAPACHRISTOPOULOS
  • Patent number: 11180594
    Abstract: Radiation curable compositions for additive fabrication processes, the components cured therefrom, and their use in particle image velocimetry testing methods are described and claimed herein. Such compositions include compounds which induce free-radical polymerization, optionally compounds which induce cationic polymerization, a filler constituent, and a light absorbing component, wherein the compositions are configured to possess certain absorbance values at wavelengths commonly utilized in particle image velocimetry testing. In another embodiment, the compositions include a fluoroantimony-modified compound. Such compositions may be used in particle imaging velocimetry testing methods, wherein the test object utilized is created via additive fabrication and is of a substantially homogeneous construction.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: November 23, 2021
    Assignee: Covestro (Netherlands) B.V.
    Inventors: Kangtai Ren, Robin Papachristopoulos
  • Publication number: 20200339718
    Abstract: Radiation curable compositions for additive fabrication processes, the components cured therefrom, and their use in particle image velocimetry testing methods are described and claimed herein. Such compositions include compounds which induce free-radical polymerization, optionally compounds which induce cationic polymerization, a filler constituent, and a light absorbing component, wherein the compositions are configured to possess certain absorbance values at wavelengths commonly utilized in particle image velocimetry testing. In another embodiment, the compositions include a fluoroantimony-modified compound. Such compositions may be used in particle imaging velocimetry testing methods, wherein the test object utilized is created via additive fabrication and is of a substantially homogeneous construction.
    Type: Application
    Filed: December 19, 2018
    Publication date: October 29, 2020
    Inventors: Kangtai REN, Robin PAPACHRISTOPOULOS
  • Publication number: 20200102442
    Abstract: Matrix-filled liquid radiation curable resin compositions for additive fabrication are described and claimed. Such resins include a cationically polymerizable component that is an aliphatic epoxide, a multifunctional (meth)acrylate component, a cationic photoinitiator, a free-radical photoinitiator, and a matrix of inorganic fillers, wherein the matrix further constitutes prescribed ratios of at least one microparticle constituent and at least one nanoparticle constituent. Also described and claimed is a process for using the matrix-filled liquid radiation curable resins for additive fabrication to create three dimensional parts, and the three-dimensional parts made from the liquid radiation curable resins for additive fabrication.
    Type: Application
    Filed: November 20, 2019
    Publication date: April 2, 2020
    Inventors: Mingbo HE, Beth RUNDLETT, Kangtai REN, Caroline LIU, TaiYeon LEE, Brad SEURER, Robin PAPACHRISTOPOULOS
  • Patent number: 10526469
    Abstract: Matrix-filled liquid radiation curable resin compositions for additive fabrication are described and claimed. Such resins include a cationically polymerizable component that is an aliphatic epoxide, a multifunctional (meth)acrylate component, a cationic photoinitiator, a free-radical photoinitiator, and a matrix of inorganic fillers, wherein the matrix further constitutes prescribed ratios of at least one microparticle constituent and at least one nanoparticle constituent. Also described and claimed is a process for using the matrix-filled liquid radiation curable resins for additive fabrication to create three dimensional parts, and the three-dimensional parts made from the liquid radiation curable resins for additive fabrication.
    Type: Grant
    Filed: March 12, 2018
    Date of Patent: January 7, 2020
    Assignee: DSM IP ASSETS, B.V.
    Inventors: Mingbo He, Beth Rundlett, Kangtai Ren, Caroline Liu, TaiYeon Lee, Brad Seurer, Robin Papachristopoulos
  • Publication number: 20180265669
    Abstract: Matrix-filled liquid radiation curable resin compositions for additive fabrication are described and claimed. Such resins include a cationically polymerizable component that is an aliphatic epoxide, a multifunctional (meth)acrylate component, a cationic photoinitiator, a free-radical photoinitiator, and a matrix of inorganic fillers, wherein the matrix further constitutes prescribed ratios of at least one microparticle constituent and at least one nanoparticle constituent. Also described and claimed is a process for using the matrix-filled liquid radiation curable resins for additive fabrication to create three dimensional parts, and the three-dimensional parts made from the liquid radiation curable resins for additive fabrication.
    Type: Application
    Filed: March 12, 2018
    Publication date: September 20, 2018
    Inventors: Mingbo HE, Beth RUNDLETT, Kangtai REN, Caroline LIU, TaiYeon LEE, Brad SEURER, Robin PAPACHRISTOPOULOS
  • Publication number: 20180163075
    Abstract: Described herein is a method for coating optical fiber where the coating has been cured by application of a source of monochromatic actinic radiation, such as a light emitting diode, wherein the coating contains a urethane(meth)acrylate oligomer; a (meth)acrylate diluent monomer; a diluent monomer having an electron donating group adjacent to the vinyl group, such as a vinyl ether monomer; and a photoinitiator. Also described are compositions which are capable of undergoing photopolymerization when coated on an optical fiber and when irradiated by a light emitting diode (LED) with improved surface cure and reduced yellowing. Also described are the coated optical fibers produced by such processes and compositions.
    Type: Application
    Filed: August 17, 2015
    Publication date: June 14, 2018
    Inventors: Kangtai REN, Huimin CAO, Wendell Wayne CATTRON, Robin Papachristopoulos
  • Patent number: 9951198
    Abstract: Matrix-filled liquid radiation curable resin compositions for additive fabrication are described and claimed. Such resins include a cationically polymerizable component that is an aliphatic epoxide, a multifunctional (meth)acrylate component, a cationic photoinitiator, a free-radical photo initiator, and a matrix of inorganic fillers, wherein the matrix further constitutes prescribed ratios of at least one microparticle constituent and at least one nanoparticle constituent. Also described and claimed is a process for using the matrix-filled liquid radiation curable resins for additive fabrication to create three dimensional parts, and the three-dimensional parts made from the liquid radiation curable resins for additive fabrication.
    Type: Grant
    Filed: November 25, 2015
    Date of Patent: April 24, 2018
    Assignee: DSM IP ASSETS, B.V.
    Inventors: Mingbo He, Beth Rundlett, Kangtai Ren, Caroline Liu, Tai Yeon Lee, Brad Seurer, Robin Papachristopoulos