Patents by Inventor Savvas Hadjikyriacou

Savvas Hadjikyriacou 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: 20220062828
    Abstract: A monovalent selective ion exchange membrane is disclosed. The membrane includes a polymeric microporous substrate, a cross-linked ion-transferring polymeric layer on a surface of the substrate, and a charged functionalizing layer covalently bound to the ion-transferring layer. A method of producing a monovalent selective cation exchange membrane is also disclosed. The method may include chemically adsorbing a styrene intermediate layer to a cross-linked ion-transferring polymeric layer on a surface of a polymeric microporous substrate, chlorosulfonating the styrene intermediate layer to attach a sulfonyl chloride group layer, aminating the sulfonyl group layer to attach an amine group layer, and functionalizing the amine group layer with a charged compound layer to produce the cation exchange membrane.
    Type: Application
    Filed: September 25, 2019
    Publication date: March 3, 2022
    Applicant: Evoqua Water Technolgies LLC
    Inventors: George Y. Gu, Simon Paul Dukes, Savvas Hadjikyriacou, Michael Shaw
  • Publication number: 20220062829
    Abstract: A monovalent selective ion exchange membrane is disclosed. The membrane includes a polymeric microporous substrate, a cross-linked ion-transferring polymeric layer on a surface of the substrate, and a charged functionalizing layer covalently bound to the ion-transferring layer by an acrylic group. A method of producing a monovalent selective cation exchange membrane is also disclosed. The method may include chemically adsorbing an acrylic intermediate layer comprising a chlorosulfonated methacrylate group to a cross-linked ion-transferring polymeric layer on a surface of a polymeric microporous substrate, aminating the chlorosulfonated methacrylate group to attach an amine group layer, and functionalizing the amine group layer with a charged compound layer to produce the cation exchange membrane.
    Type: Application
    Filed: September 25, 2019
    Publication date: March 3, 2022
    Inventors: George Gu, SAVVAS HADJIKYRIACOU, Simon P. DUKES, Michael J. SHAW
  • Publication number: 20210340343
    Abstract: Methods of producing an ion exchange membrane support are disclosed. The methods include saturating a polymeric microporous substrate with a charged monomer solution comprising at least one functional monomer, a cross-linking agent, and an effective amount of at least one photopolymerization initiator and polymerizing the at least one functional monomer by exposing the saturated polymeric microporous substrate to ultraviolet light under conditions effective to cross-link the at least one functional monomer and produce the ion exchange membrane support. Methods of producing a monovalent selective ion exchange membrane are also disclosed. The methods include functionalizing an exterior surface of the ion exchange membrane support with a charged compound layer, drying the ion exchange membrane support and soaking the ion exchange membrane support in a solution comprising an acid or a base for an amount of time effective to produce the monovalent selective ion exchange membrane.
    Type: Application
    Filed: September 25, 2019
    Publication date: November 4, 2021
    Applicant: Evoqua Water Technologies LLC
    Inventors: George Gu, Simon P. Dukes, Savvas Hadjikyriacou, Michael Shaw
  • Publication number: 20200381761
    Abstract: A flow battery having at least one rechargeable cell is disclosed. The at least one rechargeable cell can include an anolyte compartment, a catholyte compartment, and an anion exchange membrane positioned between the anolyte and catholyte compartments. The anion exchange membrane can have a thickness of less than 100 ?m and a steady state diffusivity of less than 0.4 ppm/hr/cm2 with respect to a cation species in an electrolyte of the rechargeable cell. A method of facilitating use of a flow battery including providing the anion exchange membrane is also disclosed. A method of facilitating storage of an electric charge comprising providing the flow battery is also disclosed. A method of producing an anion exchange membrane is also disclosed.
    Type: Application
    Filed: December 13, 2018
    Publication date: December 3, 2020
    Applicant: Evoqua Water Technolgies LLLC
    Inventors: George Y. Gu, Savvas Hadjikyriacou, Michael J. Shaw, Simon P. Dukes
  • Publication number: 20140034869
    Abstract: Replacing liquid electrolytes with solid or quasi-solid electrolytes facilitates the production of photovoltaic cells using continuous manufacturing processes, such as roll-to-roll or web processes, thus creating inexpensive, lightweight photovoltaic cells using flexible plastic substrates.
    Type: Application
    Filed: October 4, 2013
    Publication date: February 6, 2014
    Applicant: Merck Patent GmbH
    Inventors: Kethinni Chittibabu, Savvas Hadjikyriacou
  • Patent number: 8581096
    Abstract: Replacing liquid electrolytes with solid or quasi-solid electrolytes facilitates the production of photovoltaic cells using continuous manufacturing processes, such as roll-to-roll or web processes, thus creating inexpensive, lightweight photovoltaic cells using flexible plastic substrates.
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: November 12, 2013
    Assignee: Merck Patent GmbH
    Inventors: Kethinni Chittibabu, Savvas Hadjikyriacou
  • Publication number: 20110124900
    Abstract: A method for preparing substantially pure optionally substituted diaryl alkylphosphonates from an optionally substituted triarylphosphite and an optionally substituted trialkylphosphite or an optionally substituted alkanol under special reaction conditions is described.
    Type: Application
    Filed: February 1, 2011
    Publication date: May 26, 2011
    Applicant: FRX POLYMERS, INC.
    Inventors: Dieter FREITAG, Savvas Hadjikyriacou
  • Patent number: 7928259
    Abstract: A method for preparing substantially pure optionally substituted diaryl alkylphosphonates from an optionally substituted triarylphosphite and an optionally substituted trialkylphosphite or an optionally substituted alkanol under special reaction conditions is described.
    Type: Grant
    Filed: February 12, 2008
    Date of Patent: April 19, 2011
    Assignee: FRX Polymers, Inc.
    Inventors: Dieter Freitag, Savvas Hadjikyriacou
  • Patent number: 7888534
    Abstract: A method for preparing substantially pure optionally substituted diaryl alkylphosphonates from an optionally substituted triarylphosphite and an optionally substituted trialkylphosphite or an optionally substituted alkanol under special reaction conditions is described.
    Type: Grant
    Filed: October 17, 2006
    Date of Patent: February 15, 2011
    Assignee: FRX Polymers, Inc.
    Inventors: Dieter Freitag, Savvas Hadjikyriacou
  • Publication number: 20090272934
    Abstract: Replacing liquid electrolytes with solid or quasi-solid electrolytes facilitates the production of photovoltaic cells using continuous manufacturing processes, such as roll-to-roll or web processes, thus creating inexpensive, lightweight photovoltaic cells using flexible plastic substrates.
    Type: Application
    Filed: June 24, 2009
    Publication date: November 5, 2009
    Inventors: Kethinni Chittibabu, Savvas Hadjikyriacou
  • Publication number: 20090203942
    Abstract: A method for preparing substantially pure optionally substituted diaryl alkylphosphonates from an optionally substituted triarylphosphite and an optionally substituted trialkylphosphite or an optionally substituted alkanol under special reaction conditions is described.
    Type: Application
    Filed: February 12, 2008
    Publication date: August 13, 2009
    Applicant: FRX Polymers, LLC
    Inventors: Savvas Hadjikyriacou, Dieter Freitag
  • Patent number: 7544747
    Abstract: The present invention relates to fullerene derivatives including a pendant group that may be reacted to prepare a composition including a plurality of covalently bound fullerenes. The pendant group may be a cyclic ether, such as an epoxide. The present invention also relates to compositions including reaction products of these fullerene derivatives and photovoltaic devices including such polymeric compositions.
    Type: Grant
    Filed: December 7, 2007
    Date of Patent: June 9, 2009
    Assignee: Konarka Technologies, Inc.
    Inventors: Russell Gaudiana, Savvas Hadjikyriacou, David Waller, Zhengguo Zhu
  • Publication number: 20080105852
    Abstract: The present invention relates to fullerene derivatives including a pendant group that may be reacted to prepare a composition including a plurality of covalently bound fullerenes. The pendant group may be a cyclic ether, such as an epoxide. The present invention also relates to compositions including reaction products of these fullerene derivatives and photovoltaic devices including such polymeric compositions.
    Type: Application
    Filed: December 7, 2007
    Publication date: May 8, 2008
    Inventors: Russell Gaudiana, Savvas Hadjikyriacou, David Waller, Zhengguo Zhu
  • Patent number: 7329709
    Abstract: The present invention relates to fullerene derivatives including a pendant group that may be reacted to prepare a composition including a plurality of covalently bound fullerenes. The pendant group may be a cyclic ether, such as an epoxide. The present invention also relates to compositions including reaction products of these fullerene derivatives and photovoltaic devices including such polymeric compositions.
    Type: Grant
    Filed: June 1, 2005
    Date of Patent: February 12, 2008
    Assignee: Konarka Technologies, Inc.
    Inventors: Russell Gaudiana, Savvas Hadjikyriacou, David Waller, Zhengguo Zhu
  • Publication number: 20070203355
    Abstract: A method for preparing substantially pure optionally substituted diaryl alkylphosphonates from an optionally substituted triarylphosphite and an optionally substituted trialkylphosphite or an optionally substituted alkanol under special reaction conditions is described.
    Type: Application
    Filed: October 17, 2006
    Publication date: August 30, 2007
    Inventors: Dieter Freitag, Savvas Hadjikyriacou
  • Patent number: 7220914
    Abstract: Zwitterionic compounds, photovoltaic cell charge carrier layers containing such compounds, photovoltaic cells including such charge carrier layers, and related methods are disclosed.
    Type: Grant
    Filed: November 30, 2004
    Date of Patent: May 22, 2007
    Assignee: Konarka Technologies, Inc.
    Inventors: Kethinni G. Chittibabu, Savvas Hadjikyriacou, David Waller
  • Publication number: 20050279399
    Abstract: The present invention relates to fullerene derivatives including a pendant group that may be reacted to prepare a composition including a plurality of covalently bound fullerenes. The pendant group may be a cyclic ether, such as an epoxide. The present invention also relates to compositions including reaction products of these fullerene derivatives and photovoltaic devices including such polymeric compositions.
    Type: Application
    Filed: June 1, 2005
    Publication date: December 22, 2005
    Inventors: Russell Gaudiana, Savvas Hadjikyriacou, David Waller, Zhengguo Zhu
  • Publication number: 20050211292
    Abstract: Zwitterionic compounds, photovoltaic cell charge carrier layers containing such compounds, photovoltaic cells including such charge carrier layers, and related methods are disclosed.
    Type: Application
    Filed: November 30, 2004
    Publication date: September 29, 2005
    Applicant: Konarka Technologies, Inc.
    Inventors: Kethinni Chittibabu, Savvas Hadjikyriacou, David Waller
  • Patent number: 6900382
    Abstract: Replacing liquid electrolytes with solid or quasi-solid electrolytes facilitates the production of photovoltaic cells using continuous manufacturing processes, such as roll-to-roll or web processes, thus creating inexpensive, lightweight photovoltaic cells using flexible plastic substrates.
    Type: Grant
    Filed: January 24, 2003
    Date of Patent: May 31, 2005
    Assignee: Konarka Technologies, Inc.
    Inventors: Kethinni Chittibabu, Savvas Hadjikyriacou
  • Publication number: 20050045851
    Abstract: Polymer catalysts for photovoltaic cells, as well as related compositions and methods, are disclosed.
    Type: Application
    Filed: July 22, 2004
    Publication date: March 3, 2005
    Applicant: Konarka Technologies, Inc.
    Inventors: Jin-An He, Savvas Hadjikyriacou