Patents by Inventor Anastasios J. Karabelas

Anastasios J. Karabelas 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).

  • Application of rejection enhancing agents (REAs) that do not have cloud point limitations on desalination membranes
    Patent number: 9216385
    Abstract: Methods of treating used or degraded reverse osmosis membranes post-production are provided. The membranes can be treated online or offline. The reverse osmosis membranes are cleaned and then contacted with a rejection enhancing agent solution that includes polyvinylpyrrolidone or polyvinylalcohol. The reverse osmosis membrane is then contacted with a tannic acid solution to produce a reconditioned reverse osmosis membrane having reduced defects. The treatment can take place at temperatures greater than 34° C. because the polyvinylpyrrolidone and polyvinylalcohol rejection enhancing agents used do not have cloud point limitations.
    Type: Grant
    Filed: October 4, 2010
    Date of Patent: December 22, 2015
    Assignee: Saudi Arabian Oil Company
    Inventors: Nicos P. Isaias, Anastasios J. Karabelas, Sultana T. Mitrouli
  • Integrated System for Monitoring Permeate Quality in Water Treatment Facilities
    Publication number: 20140319029
    Abstract: The invention provides a method and apparatus for continuous monitoring of permeate from membrane elements in a water treatment plant, including a desalination plant. The apparatus includes a probe that includes multiple sensors such that at least one sensor is associated with each membrane element. Each sensor is coupled to a node, which is configured to communicate a signal associated with the permeate quality to a central node sink. The node may communicate wirelessly with the node sink.
    Type: Application
    Filed: July 8, 2014
    Publication date: October 30, 2014
    Inventors: Anastasios J. Karabelas, Ioannis Gragopoulos, Nicos P. Isaias
  • Integrated system for monitoring permeate quality in water treatment facilities
    Patent number: 8808539
    Abstract: The invention provides a method and apparatus for continuous monitoring of permeate from membrane elements in a water treatment plant, including a desalination plant. The apparatus includes a probe that includes multiple sensors such that at least one sensor is associated with each membrane element. Each sensor is coupled to a node, which is configured to communicate a signal associated with the permeate quality to a central node sink. The node may communicate wirelessly with the node sink.
    Type: Grant
    Filed: May 24, 2010
    Date of Patent: August 19, 2014
    Assignee: Saudi Arabian Oil Company
    Inventors: Anastasios J. Karabelas, Ioannis Gragopoulos, Nicos P. Isaias
  • Application of Rejection Enhancing Agents (REAs) that do not have Cloud Point Limitations on Desalination Membranes
    Publication number: 20120080058
    Abstract: Methods of treating used or degraded reverse osmosis membranes post-production are provided. The membranes can be treated online or offline. The reverse osmosis membranes are cleaned and then contacted with a rejection enhancing agent solution that includes polyvinylpyrrolidone or polyvinylalcohol. The reverse osmosis membrane is then contacted with a tannic acid solution to produce a reconditioned reverse osmosis membrane having reduced defects. The treatment can take place at temperatures greater than 34° C. because the polyvinylpyrrolidone and polyvinylalcohol rejection enhancing agents used do not have cloud point limitations.
    Type: Application
    Filed: October 4, 2010
    Publication date: April 5, 2012
    Applicant: Saudi Arabian Oil Company
    Inventors: Nicos P. Isaias, Anastasios J. Karabelas, Sultana T. Mitrouli
  • Integrated System for Monitoring Permeate Quality in Water Treatment Facilities
    Publication number: 20110284480
    Abstract: The invention provides a method and apparatus for continuous monitoring of permeate from membrane elements in a water treatment plant, including a desalination plant. The apparatus includes a probe that includes multiple sensors such that at least one sensor is associated with each membrane element. Each sensor is coupled to a node, which is configured to communicate a signal associated with the permeate quality to a central node sink. The node may communicate wirelessly with the node sink.
    Type: Application
    Filed: May 24, 2010
    Publication date: November 24, 2011
    Applicant: Saudi Arabian Oil Company
    Inventors: Anastasios J. Karabelas, Ioannis Gragopoulos, Nicos P. Isaias