Patents by Inventor Dennis P. Chen

Dennis P. Chen 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: 20240002306
    Abstract: The present disclosure, in various embodiments, discloses hydrothermal methods, hydrothermally modified materials and dried hydrothermally modified materials. Certain dried hydrothermally modified materials can readily releases ionic species such as alkali metal ions (K+, Na+), silicate salts, and alkaline earth metal ions (Mg2+, Ca2+). Some dried hydrothermally modified materials can readily release aluminum ions and/or silicon, such as in the form of soluble silicates. Such processes and materials are useful, for example in economically preparing potassium releasing fertilizers.
    Type: Application
    Filed: May 17, 2023
    Publication date: January 4, 2024
    Inventors: Davide Ciceri, Marcelo de Oliveira, Antoine Allanore, Dennis P. Chen, Thomas C. Close
  • Patent number: 11691927
    Abstract: The present disclosure, in various embodiments, discloses hydrothermal methods, hydrothermally modified materials and dried hydrothermally modified materials. Certain dried hydrothermally modified materials can readily releases ionic species such as alkali metal ions (K+, Na+), silicate salts, and alkaline earth metal ions (Mg2+, Ca2+). Some dried hydrothermally modified materials can readily release aluminum ions and/or silicon, such as in the form of soluble silicates. Such processes and materials are useful, for example in economically preparing potassium releasing fertilizers.
    Type: Grant
    Filed: October 1, 2020
    Date of Patent: July 4, 2023
    Assignees: Massachusetts Institute of Technology (MIT), Advanced Potash Technologies Ltd
    Inventors: Davide Ciceri, Marcelo De Oliveira, Antoine Allanore, Dennis P. Chen, Thomas C. Close
  • Publication number: 20210053885
    Abstract: The present disclosure, in various embodiments, discloses hydrothermal methods, hydrothermally modified materials and dried hydrothermally modified materials. Certain dried hydrothermally modified materials can readily releases ionic species such as alkali metal ions (K+, Na+), silicate salts, and alkaline earth metal ions (Mg2+, Ca2+). Some dried hydrothermally modified materials can readily release aluminum ions and/or silicon, such as in the form of soluble silicates. Such processes and materials are useful, for example in economically preparing potassium releasing fertilizers.
    Type: Application
    Filed: October 1, 2020
    Publication date: February 25, 2021
    Inventors: Davide Ciceri, Marcelo De Oliveira, Antoine Allanore, Dennis P. Chen, Thomas C. Close
  • Patent number: 10800712
    Abstract: The present disclosure, in various embodiments, discloses hydrothermal methods, hydrothermally modified materials and dried hydrothermally modified materials. Certain dried hydrothermally modified materials can readily releases ionic species such as alkali metal ions (K+, Na+), silicate salts, and alkaline earth metal ions (Mg2+, Ca2+). Some dried hydrothermally modified materials can readily release aluminum ions and/or silicon, such as in the form of soluble silicates. Such processes and materials are useful, for example in economically preparing potassium releasing fertilizers.
    Type: Grant
    Filed: January 18, 2018
    Date of Patent: October 13, 2020
    Assignees: Massachusetts Institute of Technology, Advanced Potash Technologies Ltd
    Inventors: Davide Ciceri, Marcelo De Oliveira, Antoine Allanore, Dennis P. Chen, Thomas C. Close
  • Publication number: 20180273436
    Abstract: The present disclosure, in various embodiments, discloses hydrothermal methods, hydrothermally modified materials and dried hydrothermally modified materials. Certain dried hydrothermally modified materials can readily releases ionic species such as alkali metal ions (K+, Na+), silicate salts, and alkaline earth metal ions (Mg2+, Ca2+). Some dried hydrothermally modified materials can readily release aluminum ions and/or silicon, such as in the form of soluble silicates. Such processes and materials are useful, for example in economically preparing potassium releasing fertilizers.
    Type: Application
    Filed: January 18, 2018
    Publication date: September 27, 2018
    Inventors: Davide CICERI, Marcelo DE OLIVEIRA, Antoine ALLANORE, Dennis P. Chen, Thomas C. Close
  • Patent number: 9815712
    Abstract: A resin is provided for selectively binding to perchloride and related anions (e.g., TcO4?, ReO4? and I?) in aqueous solution. The resin may take the form of microparticles or beads. The beads are prepared by cross-linking macromolecules such as hyperbranched PEI, and quaternizing the amines with hydrocarbon substituents.
    Type: Grant
    Filed: May 21, 2013
    Date of Patent: November 14, 2017
    Assignees: California Institute of Technology, AquaNano LLC
    Inventors: Mamadou S. Diallo, Changjun Yu, Dennis P. Chen
  • Publication number: 20140158630
    Abstract: A resin is provided for selectively binding to perchloride and related anions (e.g., TcO4?, ReO4? and I?) in aqueous solution. The resin may take the form of microparticles or beads. The beads are prepared by cross-linking macromolecules such as hyperbranched PEI, and quaternizing the amines with hydrocarbon substituents.
    Type: Application
    Filed: May 21, 2013
    Publication date: June 12, 2014
    Inventors: Mamadou S. Diallo, Changjun Yu, Dennis P. Chen