Patents by Inventor Zoi S. Metaxa

Zoi S. Metaxa 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).

  • Highly dispersed carbon nanotube-reinforced cement-based materials
    Patent number: 9499439
    Abstract: A composite cement material is prepared from cement material and carbon nanotubes, wherein the carbon nanotubes are present from about 0.02 wt % to about 0.10 wt % based on weight of cement material. The process for preparing such cement compositions includes sonicating a mixture of a surfactant, water, and carbon nanotubes; and blending the dispersion and the cement material to form a cementitious paste. The process may also include curing the cementitious paste. The composite cement materials are useful in a variety of cement applications where a reduction in nanoscale flaws and fractures is desired.
    Type: Grant
    Filed: September 4, 2015
    Date of Patent: November 22, 2016
    Assignee: Northwestern University
    Inventors: Surendra P. Shah, Maria Konsta, Zoi S. Metaxa
  • Highly-dispersed carbon nanotube-reinforced cement-based materials
    Patent number: 9365456
    Abstract: A composite cement material is prepared from cement material and carbon nanotubes, wherein the carbon nanotubes are present from about 0.02 wt % to about 0.10 wt % based on weight of cement material. The process for preparing such cement compositions includes sonicating a mixture of a surfactant, water, and carbon nanotubes; and blending the dispersion and the cement material to form a cementitious paste. The process may also include curing the cementitious paste. The composite cement materials are useful in a variety of cement applications where a reduction in nanoscale flaws and fractures is desired.
    Type: Grant
    Filed: February 6, 2009
    Date of Patent: June 14, 2016
    Assignee: Northwestern University
    Inventors: Surendra P. Shah, Maria S. Konsta-Gdoutos, Zoi S. Metaxa
  • HIGHLY-DISPERSED CARBON NANOTUBE-REINFORCED CEMENT-BASED MATERIALS
    Publication number: 20160130183
    Abstract: A composite cement material is prepared from cement material and carbon nanotubes, wherein the carbon nanotubes are present from about 0.02 wt % to about 0.10 wt % based on weight of cement material. The process for preparing such cement compositions includes sonicating a mixture of a surfactant, water, and carbon nanotubes; and blending the dispersion and the cement material to form a cementitious paste. The process may also include curing the cementitious paste. The composite cement materials are useful in a variety of cement applications where a reduction in nanoscale flaws and fractures is desired.
    Type: Application
    Filed: September 4, 2015
    Publication date: May 12, 2016
    Inventors: Surendra P. Shah, Maria S. Konsta-Gdoutos, Zoi S. Metaxa
  • Highly concentrated nano-reinforcement suspensions for cementitious materials and method of reinforcing such materials
    Patent number: 8865107
    Abstract: Highly concentrated carbon nanotube or other nano-reinforcement suspensions and/or masses are prepared for use as admixtures in cement base materials to make cementitious composite materials.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: October 21, 2014
    Assignee: Northwestern University
    Inventors: Mark C. Hersam, Jung-Woo T. Seo, Surendra P. Shah, Maria S. Konsta-Gdoutos, Zoi S. Metaxa
  • Highly concentrated nano-reinforcement suspensions for cementitious materials and method of reinforcing such materials
    Publication number: 20120042806
    Abstract: Highly concentrated carbon nanotube or other nano-reinforcement suspensions and/or masses are prepared for use as admixtures in cement base materials to make cementitious composite materials.
    Type: Application
    Filed: June 22, 2011
    Publication date: February 23, 2012
    Inventors: Mark C. Hersam, Jung-Woo T. Seo, Surendra P. Shah, Maria S. Konsta-Gdoutos, Zoi S. Metaxa
  • Highly-dispersed carbon nanotube-reinforced cement-based materials
    Publication number: 20090229494
    Abstract: A composite cement material is prepared from cement material and carbon nanotubes, wherein the carbon nanotubes are present from about 0.02 wt % to about 0.10 wt % based on weight of cement material. The process for preparing such cement compositions includes sonicating a mixture of a surfactant, water, and carbon nanotubes; and blending the dispersion and the cement material to form a cementitious paste. The process may also include curing the cementitious paste. The composite cement materials are useful in a variety of cement applications where a reduction in nanoscale flaws and fractures is desired.
    Type: Application
    Filed: February 6, 2009
    Publication date: September 17, 2009
    Inventors: Surendra P. Shah, Maria S. Konsta-Gdoutos, Zoi S. Metaxa