Patents by Inventor Vasiliki Psihogios

Vasiliki Psihogios 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).

  • Intercalates and exfoliates thereof having an improved level of extractable material
    Patent number: 6828370
    Abstract: The invetion is directed to a polymer-clay nanocomposite material comprising a melt-processible matrix oplymer and a layered clay material having decreased levels of extractable material, such as extractible salts of organic cations. This invention is also derected to processes for preparing polymer-clay nanocomposites, intercalates, exfoliates, and articles or products produced from nanocomposite materials.
    Type: Grant
    Filed: May 30, 2001
    Date of Patent: December 7, 2004
    Assignee: AMCOL International Corporation
    Inventors: Tie Lan, Vasiliki Psihogios, Shriram Bagrodia, Louis Thomas Germinario, John Walker Gilmer
  • Polymer nanocomposite comprising a matrix polymer and a layered clay material having a low quartz content
    Patent number: 6737464
    Abstract: The invention is directed to a polymer-clay nanocomposite material comprising a melt-processible matrix polymer and a layered clay material having low quartz content. This invention is also directed to a process for preparing polymer-clay nanocomposites, and articles or products produced from nanocomposite materials.
    Type: Grant
    Filed: May 30, 2000
    Date of Patent: May 18, 2004
    Assignee: University of South Carolina Research Foundation
    Inventors: Shriram Bagrodia, Louis Thomas Germinario, John Walker Gilmer, Tie Lan, Vasiliki Psihogios
  • Polymer/clay nanocomposite comprising a clay mixture and a process for making same
    Publication number: 20040082698
    Abstract: This invention relates to a polymer-clay nanocomposite comprising (i) a melt-processible matrix polymer, and incorporated therein (ii) a mixture of at least two layered clay materials. The invention also relates to articles produced from a nanocomposite and a process for preparing a nanocomposite.
    Type: Application
    Filed: October 14, 2003
    Publication date: April 29, 2004
    Inventors: Robert Boyd Barbee, John Walker Gilmer, James Christopher Matayabas, Tie Lan, Vasiliki Psihogios
  • Polymer/clay nanocomposite comprising a clay mixture and a process for making same
    Patent number: 6653388
    Abstract: This invention relates to a polymer-clay nanocomposite comprising (i) a melt-processible matrix polymer, and incorporated therein (ii) a mixture of at least two layered clay materials. The invention also relates to articles produced from a nanocomposite and a process for preparing a nanocomposite.
    Type: Grant
    Filed: December 1, 1999
    Date of Patent: November 25, 2003
    Assignee: University of South Carolina Research Foundation
    Inventors: Robert Boyd Barbee, John Walker Gilmer, James Christopher Matayabas, Jr., Tie Lan, Vasiliki Psihogios
  • Layered clay intercalates and exfoliates having a low quartz content
    Patent number: 6596803
    Abstract: The invention is directed to a polymer-clay nanocomposite material comprising a melt-processible matrix polymer and a layered clay material having low quartz content. This invention is also directed to a process for preparing a polymer-clay nanocomposites, and articles or products produced from nanocomposite materials.
    Type: Grant
    Filed: June 29, 2001
    Date of Patent: July 22, 2003
    Assignee: AMCOL International Corporation
    Inventors: Tie Lan, Vasiliki Psihogios, Shriram Bagrodia, Louis Thomas Germinario, John Walker Gilmer
  • Polymer nanocomposite comprising a matrix polymer and a layered clay material having an improved level of extractable material
    Patent number: 6586500
    Abstract: The invention is directed to a polymer-clay nanocomposite material comprising a melt-processible matrix polymer and a layered clay material having decreased levels of extractable material, such as extractable salts of organic cations. This invention is also directed to processes for preparing polymer-clay nanocomposites, and articles or products produced from nanocomposite materials.
    Type: Grant
    Filed: May 30, 2001
    Date of Patent: July 1, 2003
    Assignee: University of South Carolina Research Foundation
    Inventors: Shriram Bagrodia, Louis Thomas Germinario, John Walker Gilmer, Tie Lan, Vasiliki Psihogios
  • Process for preparing a high barrier amorphous polyamide-clay nanocomposite
    Patent number: 6552114
    Abstract: This invention relates to a process for preparing an amorphous polyamide-clay nanocomposite comprising the steps of: a. melt mixing a layered clay material with an oligomeric polyamide resin to form an oligomeric polyamide resin-clay composite, and b.
    Type: Grant
    Filed: May 13, 2002
    Date of Patent: April 22, 2003
    Assignee: University of South Carolina Research Foundation
    Inventors: Sam Richard Turner, Gary Wayne Connell, John Walker Gilmer, Vasiliki Psihogios, James Christopher Matayabas, Jr., Tie Lan, Shriram Bagrodia
  • Polymer-clay nanocomposite comprising an amorphous oligomer
    Patent number: 6552113
    Abstract: This invention is directed to a polymer-clay nanocomposite, products produced from the nanocomposite, and a process for preparing a polymer-clay nanocomposite. The polymer-clay nanocomposite comprises (a) a matrix polymer, (b) an amorphous oligomer, and (c) a layered clay material.
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: April 22, 2003
    Assignee: University of South Carolina Research Foundation
    Inventors: Shriram Bagrodia, Linda Gail Bernard, Gary Wayne Connell, John Walker Gilmer, Tie Lan, James Christopher Matayabas, Jr., Jeffrey Todd Owens, Vasiliki Psihogios, Emerson Eston Sharpe, Jr., Sam Richard Turner
  • Polyamide composition comprising a layered clay material modified with an alkoxylated onium compound
    Patent number: 6548587
    Abstract: This invention relates to a composite composition comprising one or more polyamide polymers or copolymers, one or more layered clay materials, and one or more alkoxylated ammonium cations. The invention also relates to a process for preparing a nanocomposite and articles produced from the nanocomposite, including bottles.
    Type: Grant
    Filed: June 14, 2000
    Date of Patent: April 15, 2003
    Assignee: University of South Carolina Research Foundation
    Inventors: Shriram Bagrodia, John Walker Gilmer, Jeffrey Todd Owens, Linda Gail Bernard, Sam Richard Turner, James Christopher Matayabas, Jr., Vasiliki Psihogios, Tie Lan
  • Process for preparing a high barrier amorphous polyamide-clay nanocomposite
    Publication number: 20030013796
    Abstract: This invention relates to a process for preparing an amorphous polyamide-clay nanocomposite comprising the steps of:
    Type: Application
    Filed: May 13, 2002
    Publication date: January 16, 2003
    Applicant: Eastman Chemical Company
    Inventors: Sam Richard Turner, Gary Wayne Connell, John Walker Gilmer, Vasiliki Psihogios, James Christopher Matayabas, Tie Lan, Shriram Bagrodia
  • Polymer-clay nanocomposite comprising an amorphous oligomer
    Publication number: 20020119266
    Abstract: This invention is directed to a polymer-clay nanocomposite, products produced from the nanocomposite, and a process for preparing a polymer-clay nanocomposite. The polymer-clay nanocomposite comprises (a) a matrix polymer, (b) an amorphous oligomer, and (c) a layered clay material.
    Type: Application
    Filed: December 1, 2000
    Publication date: August 29, 2002
    Inventors: Shriram Bagrodia, Linda G. Bernard, Gary W. Connell, John W. Gilmer, Tie Lan, James C. Matayabas, Jeffrey T. Owens, Vasiliki Psihogios, Emerson E. Sharpe, Sam R. Turner
  • Polymer nanocomposite comprising a matrix polymer and a layered clay material having an improved level of extractable material
    Publication number: 20020098309
    Abstract: The invention is directed to a polymer-clay nanocomposite material comprising a melt-processible matrix polymer and a layered clay material having decreased levels of extractable material, such as extractable salts of organic cations. This invention is also directed to processes for preparing polymer-clay nanocomposites, and articles or products produced from nanocomposite materials.
    Type: Application
    Filed: May 30, 2001
    Publication date: July 25, 2002
    Inventors: Shriram Bagrodia, Louis Thomas Germinario, John Walker Gilmer, Tie Lan, Vasiliki Psihogios
  • High barrier amorphous polyamide-clay nanocomposite and a process for preparing same
    Patent number: 6417262
    Abstract: This invention is directed to a polyamide-clay nanocomposite, products produced from the nanocomposite, and a process for preparing a polyamide-clay nanocomposite. The polyamide-clay nanocomposite comprises (a) an amorphous matrix polyamide comprising (i) a residue of a dicarboxylic acid component comprising at least two diacids and (ii) a residue of a diamine component, and (b) a layered clay material, wherein the layered clay material is dispersed in the matrix polyamide.
    Type: Grant
    Filed: December 1, 1999
    Date of Patent: July 9, 2002
    Assignee: Eastman Chemical Company
    Inventors: Sam Richard Turner, Gary Wayne Connell, John Walker Gilmer, Vasiliki Psihogios, James Christopher Matayabas, Jr., Tie Lan, Shriram Bagrodia
  • LAYERED COMPOSITIONS WITH MULTI-CHARGED ONIUM IONS AS EXCHANGE CATIONS, AND THEIR APPLICATION TO PREPARE MONOMER, OLIGOMER, AND POLYMER INTERCALATES AND NANOCOMPOSITES PREPARED WITH THE LAYERED COMPOSITIONS OF THE INTERCALATES
    Patent number: 6399690
    Abstract: Intercalated layered materials prepared by co-intercalation of a multi-charged onium ion spacing/coupling agent and a matrix polymer between the planar layers of a swellable layered material, such as a phyllosilicate, preferably a smectite clay. The spacing of adjacent layers of the layered materials is expanded at least about 3 Å, preferably at least about 5 Å, usually to about 15-20 Å, e.g., 18 Å with the di-charged onium ion spacing/coupling agent. The intercalation of the matrix polymer then increases the spacing between adjacent layers to at least about 15 Å, preferably to about 20 Å to about 30 Å.
    Type: Grant
    Filed: March 7, 2001
    Date of Patent: June 4, 2002
    Assignee: AMCOL International Corporation
    Inventors: Tie Lan, Erin K. Westphal, Vasiliki Psihogios, Ying Liang
  • Polymer/clay intercalates, exfoliates, and nanocomposites comprising a clay mixture and a process for making same
    Patent number: 6391449
    Abstract: This invention relates to a polymer-clay intercalates, exfoliates, nanocomposites and methods of manufacturing comprising (i) a melt-processible matrix polymer, and incorporated therein (ii) a mixture of at least two layered clay materials. The invention also relates to articles produced from a nanocomposite and a process for preparing a nanocomposite.
    Type: Grant
    Filed: December 1, 1999
    Date of Patent: May 21, 2002
    Assignee: AMCOL International Corporation
    Inventors: Tie Lan, Vasiliki Psihogios, Robert Boyd Barbee, James Christopher Matayabas, Jr., John Walker Gilmer
  • High barrier amorphous polyamide-clay intercalates, exfoliates, and nanocomposite and a process for preparing same
    Patent number: 6376591
    Abstract: This invention is directed to a polyamide-clay nanocomposite, products produced from the nanocomposite, and a process for preparing a polyamide-clay nanocomposite. The polyamide-clay nanocomposite comprises (a) an amorphous matrix polyamide comprising (i) a residue of a dicarboxylic acid component comprising at least two diacids and (ii) a residue of a diamine component, and (b) a layered clay material, wherein the layered clay material is dispersed in the matrix polyamide.
    Type: Grant
    Filed: December 1, 1999
    Date of Patent: April 23, 2002
    Assignee: Amcol International Corporation
    Inventors: Tie Lan, Vasiliki Psihogios, Sam Richard Turner, Gary Wayne Connell, James Christopher Matayabas, Jr., John Walker Gilmer
  • Intercalates and exfoliates thereof having an improved level of extractable material
    Publication number: 20020037953
    Abstract: The invetion is directed to a polymer-clay nanocomposite material comprising a melt-processible matrix oplymer and a layered clay material having decreased levels of extractable material, such as extratible saltssof organic cations. This invention is also derected to processes for preparing polymer-clay nanocomposites, intercalates, exfoliates, and articles or products produced from nanocomposite materials.
    Type: Application
    Filed: May 30, 2001
    Publication date: March 28, 2002
    Inventors: Tie Lan, Vasiliki Psihogios, Shriram Bagrodia, Louis Thomas Germinario, John Walker Gilmer
  • Layered clay intercalates and exfoliates having a low quartz content
    Publication number: 20020028870
    Abstract: The invention is directed to a polymer-clay nanocomposite material comprising a melt-processible matrix polymer and a layered clay material having low quartz content. This invention is also directed to a process for preparing a polymer-clay nanocomposites, and articles or products produced from nanocomposite materials.
    Type: Application
    Filed: June 29, 2001
    Publication date: March 7, 2002
    Applicant: AMCOL International Corporation
    Inventors: Tie Lan, Vasiliki Psihogios, Shriram Bagrodia, Louis Thomas Germinario, John Walker Gilmer
  • Layered compositions with multi-charged onium ions as exchange cations, and their application to prepare monomer, oligomer, and polymer intercalates and nanocomposites prepared with the layered compositions of the intercalates
    Publication number: 20010025076
    Abstract: Intercalated layered materials prepared by co-intercalation of a multi-charged onium ion spacing/coupling agent and a matrix polymer between the planar layers of a swellable layered material, such as a phyllosilicate, preferably a smectite clay. The spacing of adjacent layers of the layered materials is expanded at least about 3 Å, preferably at least about 5 Å, usually to about 15-20 Å, e.g., 18 Å with the di-charged onium ion spacing/coupling agent. The intercalation of the matrix polymer then increases the spacing between adjacent layers to at least about 15 Å, preferably to about 20 Å to about 30 Å.
    Type: Application
    Filed: March 7, 2001
    Publication date: September 27, 2001
    Applicant: AMCOL International Corporation
    Inventors: Tie Lan, Erin K. Westphal, Vasiliki Psihogios, Ying Liang
  • Layered compositions with multi-charged onium ions as exchange cations, and their application to prepare monomer, oligomer, and polymer intercalates and nanocomposites prepared with the layered compositions of the intercalates
    Patent number: 6262162
    Abstract: Intercalated layered materials prepared by co-intercalation of a multi-charged onium ion spacing/coupling agent and a matrix polymer between the planar layers of a swellable layered material, such as a phyllosilicate, preferably a smectite clay. The spacing of adjacent layers of the layered materials is expanded at least about 3 Å, preferably at least about 5 Å, usually to about 15-20 Å, e.g., 18 Å with the di-charged onium ion spacing/coupling agent. The intercalation of the matrix polymer then increases the spacing between adjacent layers to at least about 15 Å, preferably to about 20 Å to about 30 Å.
    Type: Grant
    Filed: March 19, 1999
    Date of Patent: July 17, 2001
    Assignee: AMCOL International Corporation
    Inventors: Tie Lan, Erin K. Westphal, Vasiliki Psihogios, Ying Liang