Patents by Inventor Dimitris Argyropoulos

Dimitris Argyropoulos 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).

  • Patent number: 11884784
    Abstract: Provided herein are photodynamic compositions that can contain a natural polymer scaffold and a photosensitizer, where the photosensitizer can be covalently or non-covalently attached to the natural polymer scaffold. Also provided herein are structures and objects that can contain the photodynamic compositions. Further provided herein are methods of making and using the photodynamic compositions. Finally provided herein are printing ink formulations.
    Type: Grant
    Filed: May 14, 2021
    Date of Patent: January 30, 2024
    Assignee: North Carolina State University
    Inventors: Reza Arman Ghiladi, Dimitris Argyropoulos, Frank Scholle
  • Publication number: 20210269604
    Abstract: Provided herein are photodynamic compositions that can contain a natural polymer scaffold and a photosensitizer, where the photosensitizer can be covalently or non-covalently attached to the natural polymer scaffold. Also provided herein are structures and objects that can contain the photodynamic compositions. Further provided herein are methods of making and using the photodynamic compositions. Finally provided herein are printing ink formulations.
    Type: Application
    Filed: May 14, 2021
    Publication date: September 2, 2021
    Inventors: Reza Arman Ghiladi, Dimitris Argyropoulos, Frank Scholle
  • Patent number: 11039616
    Abstract: Provided herein are photodynamic compositions that can contain a natural polymer scaffold and a photosensitizer, where the photosensitizer can be covalently or non-covalently attached to the natural polymer scaffold. Also provided herein are structures and objects that can contain the photodynamic compositions. Further provided herein are methods of making and using the photodynamic compositions.
    Type: Grant
    Filed: May 10, 2017
    Date of Patent: June 22, 2021
    Assignee: NORTH CAROLINA STATE UNIVERSITY
    Inventors: Reza Arman Ghiladi, Dimitris Argyropoulos, Frank Scholle
  • Publication number: 20190133132
    Abstract: Provided herein are photodynamic compositions that can contain a natural polymer scaffold and a photosensitizer, where the photosensitizer can be covalently or non-covalently attached to the natural polymer scaffold. Also provided herein are structures and objects that can contain the photodynamic compositions. Further provided herein are methods of making and using the photodynamic compositions.
    Type: Application
    Filed: May 10, 2017
    Publication date: May 9, 2019
    Inventors: Reza Arman Ghiladi, Dimitris Argyropoulos, Frank Scholle
  • Patent number: 8182557
    Abstract: The present invention provides a method for converting lignocellulosic material into biofuel. In particular embodiments, the method comprises pre-treating lignocellulosic material by dissolving the material in ionic liquids. The pretreated lignocellulosic material can be isolated, such as by precipitation with a regenerating solvent (e.g., water), and be used directly in the formation of biofuel, including undergoing hydrolysis to form sugar and fermentation to form fuel, such as bioethanol. The ionic liquid can be recycled for further use, such as by evaporation of the water introduced during precipitation, and the recycling provides a route to a hemicellulose rich fraction and an ionic liquid of consistent quality and wood dissolution characteristics. The recovered hemicelluloses are of significant utilization potential toward commodity and specialty applications.
    Type: Grant
    Filed: February 6, 2008
    Date of Patent: May 22, 2012
    Assignee: North Carolina State University
    Inventor: Dimitris Argyropoulos
  • Patent number: 7959765
    Abstract: Methods for the thermolysis of lignocellulosic materials, such as wood, cellulose, lignin, and lignocellulose are provided. Some methods comprise combining the lignocellulosic material with an ionic liquid and subjecting the mixture of the lignocellulosic material and the ionic media to thermolysis conditions to form a recoverable product, such as a commodity chemical.
    Type: Grant
    Filed: February 6, 2008
    Date of Patent: June 14, 2011
    Assignee: North Carolina State Universtiy
    Inventor: Dimitris Argyropoulos
  • Publication number: 20080190013
    Abstract: The present invention provides a method for converting lignocellulosic material into biofuel. In particular embodiments, the method comprises pre-treating lignocellulosic material by dissolving the material in ionic liquids. The pretreated lignocellulosic material can be isolated, such as by precipitation with a regenerating solvent (e.g., water), and be used directly in the formation of biofuel, including undergoing hydrolysis to form sugar and fermentation to form fuel, such as bioethanol. The ionic liquid can be recycled for further use, such as by evaporation of the water introduced during precipitation, and the recycling provides a route to a hemicellulose rich fraction and an ionic liquid of consistent quality and wood dissolution characteristics. The recovered hemicelluloses are of significant utilization potential toward commodity and specialty applications.
    Type: Application
    Filed: February 6, 2008
    Publication date: August 14, 2008
    Inventor: Dimitris Argyropoulos
  • Publication number: 20080188636
    Abstract: The present invention provides wood derivatives and composite materials prepared by first solvating a lignocellulosic material using an ionic liquid. The solvated lignocellulosic material can be derivatized to incorporate functional groups, particularly groups that facilitate later combination with polymer materials, including non-polymer polymers. The polymeric materials can be combined with the derivatized lignocellulosic material in solution, or the derivatized lignocellulosic material can be isolated and later combined with the polymeric material in a melt. The invention encompasses a variety of wood derivatives, composites, and nanocomposites useful for preparing multiple types of products, including membranes, fibers, and formed parts.
    Type: Application
    Filed: February 6, 2008
    Publication date: August 7, 2008
    Inventors: Dimitris Argyropoulos, Haibo Xie
  • Publication number: 20080185112
    Abstract: The present invention provides methods for the thermolysis of lignocellulosic materials, such as wood, cellulose, lignin, and lignocellulose. In specific embodiments, the methods comprise combining the lignocellulosic material with an ionic liquid and subjecting the mixture of the lignocellulosic material and the ionic media to pyrolytic conditions to form a recoverable product, such as a commodity chemical.
    Type: Application
    Filed: February 6, 2008
    Publication date: August 7, 2008
    Inventor: Dimitris Argyropoulos