Patents by Inventor DIMITRIS S. ACHILIAS

DIMITRIS S. ACHILIAS 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: 11477986
    Abstract: A method of making an antimicrobial poly(methyl methacrylate) (PMMA)/silver nanocomposite comprising PMMA and silver nanoparticles. The method includes reacting at least one silver salt with a methyl methacrylate (MMA) monomer in at least one organic solvent free of water and in the presence of at least one organic free radical initiator to polymerize the MMA monomer to form the PMMA by free radical polymerization while reducing in-situ the silver salt to form the silver nanoparticles, wherein the silver nanoparticles have an average particle size of 35-60 nm, and wherein the PMMA forms a matrix that encloses the silver nanoparticles.
    Type: Grant
    Filed: July 12, 2019
    Date of Patent: October 25, 2022
    Assignee: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
    Inventors: Mohammad Nahid Siddiqui, Dimitris S. Achilias, Halim Hamid Redhwi
  • Publication number: 20190327976
    Abstract: A method of making an antimicrobial poly(methyl methacrylate) (PMMA)/silver nanocomposite comprising PMMA and silver nanoparticles. The method includes reacting at least one silver salt with a methyl methacrylate (MMA) monomer in at least one organic solvent free of water and in the presence of at least one organic free radical initiator to polymerize the MMA monomer to form the PMMA by free radical polymerization while reducing in-situ the silver salt to form the silver nanoparticles, wherein the silver nanoparticles have an average particle size of 35-60 nm, and wherein the PMMA forms a matrix that encloses the silver nanoparticles.
    Type: Application
    Filed: July 12, 2019
    Publication date: October 31, 2019
    Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
    Inventors: Mohammad Nahid Siddiqui, Dimitris S. Achilias, Halim Hamid Redhwi
  • Patent number: 10412970
    Abstract: A method of making an antimicrobial poly(methyl methacrylate) (PMMA)/silver nanocomposite comprising PMMA and silver nanoparticles. The method includes reacting at least one silver salt with a methyl methacrylate (MMA) monomer in at least one organic solvent free of water and in the presence of at least one organic free radical initiator to polymerize the MMA monomer to form the PMMA by free radical polymerization while reducing in-situ the silver salt to form the silver nanoparticles, wherein the silver nanoparticles have an average particle size of 35-60 nm, and wherein the PMMA forms a matrix that encloses the silver nanoparticles.
    Type: Grant
    Filed: August 2, 2018
    Date of Patent: September 17, 2019
    Assignee: King Fahd University of Petroleum and Minerals
    Inventors: Dimitris S. Achilias, Mohammad Nahid Siddiqui, Halim Hamid Redhwi
  • Patent number: 10383337
    Abstract: A method of making an antimicrobial poly(methyl methacrylate) (PMMA)/silver nanocomposite comprising PMMA and silver nanoparticles. The method includes reacting at least one silver salt with a methyl methacrylate (MMA) monomer in at least one organic solvent free of water and in the presence of at least one organic free radical initiator to polymerize the MMA monomer to form the PMMA by free radical polymerization while reducing in-situ the silver salt to form the silver nanoparticles, wherein the silver nanoparticles have an average particle size of 35-60 nm, and wherein the PMMA forms a matrix that encloses the silver nanoparticles.
    Type: Grant
    Filed: August 2, 2018
    Date of Patent: August 20, 2019
    Assignee: King Fahd University of Petroleum and Minerals
    Inventors: Dimitris S. Achilias, Mohammad Nahid Siddiqui, Halim Hamid Redhwi
  • Publication number: 20180343871
    Abstract: A method of making an antimicrobial poly(methyl methacrylate) (PMMA)/silver nanocomposite comprising PMMA and silver nanoparticles. The method includes reacting at least one silver salt with a methyl methacrylate (MMA) monomer in at least one organic solvent free of water and in the presence of at least one organic free radical initiator to polymerize the MMA monomer to form the PMMA by free radical polymerization while reducing in-situ the silver salt to form the silver nanoparticles, wherein the silver nanoparticles have an average particle size of 35-60 nm, and wherein the PMMA forms a matrix that encloses the silver nanoparticles.
    Type: Application
    Filed: August 2, 2018
    Publication date: December 6, 2018
    Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
    Inventors: Dimitris S. ACHILIAS, Mohammad Nahid SIDDIQUI, Halim Hamid REDHWI
  • Publication number: 20180338497
    Abstract: A method of making an antimicrobial poly(methyl methacrylate) (PMMA)/silver nanocomposite comprising PMMA and silver nanoparticles. The method includes reacting at least one silver salt with a methyl methacrylate (MMA) monomer in at least one organic solvent free of water and in the presence of at least one organic free radical initiator to polymerize the MMA monomer to form the PMMA by free radical polymerization while reducing in-situ the silver salt to form the silver nanoparticles, wherein the silver nanoparticles have an average particle size of 35-60 nm, and wherein the PMMA forms a matrix that encloses the silver nanoparticles.
    Type: Application
    Filed: August 2, 2018
    Publication date: November 29, 2018
    Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
    Inventors: DIMITRIS S. ACHILIAS, Mohammad Nahid SIDDIQUI, Halim Hamid REDHWI
  • Patent number: 10076118
    Abstract: A method of making an antimicrobial poly(methyl methacrylate) (PMMA)/silver nanocomposite comprising PMMA and silver nanoparticles. The method includes reacting at least one silver salt with a methyl methacrylate (MMA) monomer in at least one organic solvent free of water and in the presence of at least one organic free radical initiator to polymerize the MMA monomer to form the PMMA by free radical polymerization while reducing in-situ the silver salt to form the silver nanoparticles, wherein the silver nanoparticles have an average particle size of 35-60 nm, and wherein the PMMA forms a matrix that encloses the silver nanoparticles.
    Type: Grant
    Filed: December 27, 2016
    Date of Patent: September 18, 2018
    Assignee: King Fahd University of Petroleum and Minerals
    Inventors: Dimitris S. Achilias, Mohammad Nahid Siddiqui, Halim Hamid Redhwi
  • Publication number: 20170181439
    Abstract: A method of making an antimicrobial poly(methyl methacrylate) (PMMA)/silver nanocomposite comprising PMMA and silver nanoparticles. The method includes reacting at least one silver salt with a methyl methacrylate (MMA) monomer in at least one organic solvent free of water and in the presence of at least one organic free radical initiator to polymerize the MMA monomer to form the PMMA by free radical polymerization while reducing in-situ the silver salt to form the silver nanoparticles, wherein the silver nanoparticles have an average particle size of 35-60 nm, and wherein the PMMA forms a matrix that encloses the silver nanoparticles.
    Type: Application
    Filed: December 27, 2016
    Publication date: June 29, 2017
    Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
    Inventors: Dimitris S. ACHILIAS, Mohammad Nahid SIDDIQUI, Halim Hamid REDHWI
  • Publication number: 20150031811
    Abstract: The polymer-clay nano composite material is a nanocomposite formed from poly(styrene-co-ethyl methacrylate) copolymer and organo-modified clay by in situ polymerization. Nanoparticles of a montmorillonite clay that has been modified with a quaternary ammonium salt are dispersed into a mixture of styrene and ethyl methacrylate monomers to form a mixture, which then undergoes bulk radical polymerization. The poly(styrene-co-ethyl methacrylate) copolymer preferably has a styrene to ethyl methacrylate ratio of about 1:1. Preferably, the organically modified montmorillonite clay forms between 1.0 wt % and 5.0 wt % of the mixture. A free radical initiator, such as benzoyl peroxide, is used to initiate polymerization. The clay nano-filler provides the nanocomposite with improved thermal stability.
    Type: Application
    Filed: July 29, 2013
    Publication date: January 29, 2015
    Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
    Inventors: MOHAMMAD NAHID SIDDIQUI, HALIM HAMID REDHWI, DIMITRIS S. ACHILIAS
  • Publication number: 20140163168
    Abstract: The polymer-clay nanocomposite material is a nanocompo site formed from poly(styrene-co-butyl methacrylate) copolymer and organo-modified clay by in situ polymerization. Nanoparticles of a montmorillonite clay that has been modified with a quaternary ammonium salt is dispersed into a mixture of polystyrene and butyl methacrylate monomers to form a mixture, which then undergoes bulk radical polymerization. The poly(styrene-co-butyl methacrylate) copolymer may have a styrene to butyl methacrylate ratio of about 60 to 40 or about 20:80. Preferably, the organically modified montmorillonite clay forms between 1.0 wt % and 5.0 wt % of the mixture. A free radical initiator, such as benzoyl peroxide, is used to initiate polymerization. The clay nano-filler provides the nanocomposite with improved thermal stability.
    Type: Application
    Filed: December 12, 2012
    Publication date: June 12, 2014
    Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS
    Inventors: MOHAMMAD NAHID SIDDIQUI, HALIM HAMID REDHWI, DIMITRIS S. ACHILIAS, KLONTIAN GKINIS