Patents Assigned to Princeton Trade and Technology
-
Patent number: 8747883Abstract: Polymeric articles capable of releasing drugs at therapeutic levels over extended periods of time, and methods for producing the extended release articles.Type: GrantFiled: June 2, 2010Date of Patent: June 10, 2014Assignee: Princeton Trade & Technology, Inc.Inventors: Mohamed E. Labib, Theodore Davidson, Stanislav S. Dukhin, James Christopher Post, Garth Ehrlich, Paul Stoodley
-
Patent number: 8747569Abstract: Apparatus and methods are disclosed for cleaning interiors of passageways in endoscopes or other luminal medical devices by flow of liquid and gas therethrough. The liquid flow may include rivulets, droplets or other liquid entities which move on the internal surfaces of the passageways, and may include a three-phase contact interface between liquid and dry solid and gas.Type: GrantFiled: July 24, 2012Date of Patent: June 10, 2014Assignee: Princeton Trade & Technology, Inc.Inventors: Mohamed Emam Labib, Ching-Yue Lai, Yacoob Tabani, Ziye Qian, Stanislav S. Dukhin, Joseph J. Murawski
-
Publication number: 20120285488Abstract: Apparatus and methods are disclosed for cleaning interiors of passageways in endoscopes or other luminal medical devices by flow of liquid and gas therethrough. The liquid flow may include rivulets, droplets or other liquid entities which move on the internal surfaces of the passageways, and may include a three-phase contact interface between liquid and dry solid and gas.Type: ApplicationFiled: July 24, 2012Publication date: November 15, 2012Applicant: Princeton Trade and Technology. Inc.Inventors: Mohamed Emam Labib, Ching-Yue Lai, Yacoob Tabani, Ziye Qian, Stanislav S. Dukhin, Joseph J. Murawski
-
Publication number: 20120234357Abstract: A method for cleaning an internal surface of a narrow diameter channel includes steps of flowing a liquid cleaning medium and a gas through the narrow diameter channel under a flow regime that creates surface flow entities in contact with and sliding along the internal surface of the narrow diameter channel, said surface flow entities having three-phase contact lines and associated menisci, said surface flow entities detaching contaminants with which they come in contact from the internal surface of the narrow diameter internal surface of the narrow diameter channel; and rinsing the internal surface of the narrow diameter channel to remove residual liquid cleaning medium and detached contaminants from the channel.Type: ApplicationFiled: February 13, 2012Publication date: September 20, 2012Applicant: Princeton Trade and Technology, Inc.Inventors: Mohamed Emam Labib, Stanislav S. Dukhin, Joseph J. Murawski, Yacoob Tabani, Ching-Yue Lai
-
Patent number: 8226774Abstract: Apparatus and methods are disclosed for cleaning interiors of passageways in endoscopes or other luminal medical devices by flow of liquid and gas therethrough. The liquid flow may include rivulets, droplets or other liquid entities which move on the internal surfaces of the passageways, and may include a three-phase contact interface between liquid and dry solid and gas.Type: GrantFiled: September 30, 2008Date of Patent: July 24, 2012Assignee: Princeton Trade & Technology, Inc.Inventors: Mohamed Emam Labib, Ching-Yue Lai, Yacoob Tabani, Ziye Qian, Stanislav S. Dukhin, Joseph J. Murawski
-
Patent number: 8114221Abstract: The narrow diameter channel has a diameter of about 0.02 centimeter to about 1.6 centimeters and a length of about 0.75 meter to about 5 meters. The internal surface of the narrow diameter channel is hydrophobic, and the surface flow entities exhibit an advancing contact angle of greater than 50 degrees and a receding contact angle of greater than zero degree. The detachment of contaminants from the internal surface of the narrow diameter channel is produced by a sweeping of the internal surface of the narrow diameter channel with the three-phase contact lines of the surface flow entities, the cleaning medium is not predispersed in the gas before entering the channel, and less that 10% of the surface of the channel is covered by a contiguous annular film.Type: GrantFiled: September 30, 2008Date of Patent: February 14, 2012Assignee: Princeton Trade & Technology, Inc.Inventors: Mohamed Emam Labib, Stanislav S. Dukhin, Joseph J. Murawski, Yacoob Tabani, Ching-Yue Lai
-
Patent number: 7862660Abstract: A method for cleaning interior surfaces of a header region of a hemodialyzer includes steps of: introducing an insertion device having an end portion and a shaft through a hemodialyzer plug port so that the end portion of the insertion device is within the header region; rotating the shaft at a speed sufficient to generate mechanical stresses for the removal of contaminants from interior surfaces of the header region; removing the insertion device from the header region; and rinsing and flushing away the removed contaminants from the header region. An apparatus and an insertion device for cleaning a header region of a hemodialyzer are disclosed.Type: GrantFiled: January 12, 2007Date of Patent: January 4, 2011Assignee: Princeton Trade & Technology, Inc.Inventors: Joseph J. Murawski, Yacoob Tabani, Mohamed Eman Labib
-
Publication number: 20090229632Abstract: An apparatus and method for cleaning passageways and the like with a two-phase mixture of gas under pressure and an aqueous cleaning solution. The two-phase cleaning mixture is generated in a module and is passed out of the module at a predetermined rate that determines droplet size, velocity and droplet density at the pipeline surface to be cleaned. The droplets impact the walls of the passageway to be cleaned, thereby fragmenting, eroding and removing contaminants in said passageway. These are then flushed out of the passageway by the two-phase flow. The flow of cleaning solution can be steady or pulsed. The apparatus and process include a clean-in-place system that is useful in food, beverage, pharmaceutical and similar process industries.Type: ApplicationFiled: January 16, 2009Publication date: September 17, 2009Applicant: Princeton Trade and TechnologyInventors: Mohamed Emam Labib, Chung-Yue Lai, Yacoob Tabani
-
Patent number: 7367346Abstract: Hollow porous fibers containing adhered contaminants are cleaned to remove the contaminants by backflushing a liquid to fill the pores, and adding a flow of gas so as to form a two-phase mixture of gas and bubbles of liquid that can scrub the fibers, loosening the contaminants and allowing them to be flushed from the hollow fibers. The method is particularly useful for cleaning hemodialyzers used for dialysis and hollow fiber modules used in water treatment and separations. The two phase flow method is specifically effective in cleaning piping systems having high length to diameter (l/d) ratios.Type: GrantFiled: February 7, 2005Date of Patent: May 6, 2008Assignee: Princeton Trade & Technology, Inc.Inventors: Yacoob Tabani, Mohamed Emam Labib
-
Publication number: 20050272625Abstract: Removal of water-insoluble organic residues from inorganic surfaces can be accomplished in aqueous cleaning solutions containing an oxidant at a preselected temperature wherein the pH is adjusted with respect to the isoelectric point of the surface material to be removed so that the pH is above the pKa and the isoelectric point of the surface for acid materials, and below the pKa and the isoelectric point of the surface for basic materials. Surfactants can also be added to the cleaning solution.Type: ApplicationFiled: June 13, 2005Publication date: December 8, 2005Applicant: Princeton Trade & Technology Inc.Inventor: Mohamed Labib
-
Patent number: 6945257Abstract: Hollow porous fibers containing adhered contaminants are cleaned to remove the contaminants by backflushing a liquid to fill the pores, and adding a flow of gas so as to form a two-phase mixture of gas and bubbles of liquid that can scrub the fibers, loosening the contaminants and allowing them to be flushed from the hollow fibers. The method is particularly useful for cleaning hemodialyzers used for dialysis and hollow fiber modules used in water treatment and separations. The two phase flow method is specifically effective in cleaning piping systems having high length to diameter (l/d) ratios.Type: GrantFiled: March 5, 2002Date of Patent: September 20, 2005Assignee: Princeton Trade & TechnologyInventors: Yacoob Tabani, Mohamed Emam Labib
-
Publication number: 20050150831Abstract: Hollow porous fibers containing adhered contaminants are cleaned to remove the contaminants by backflushing a liquid to fill the pores, and adding a flow of gas so as to form a two-phase mixture of gas and bubbles of liquid that can scrub the fibers, loosening the contaminants and allowing them to be flushed from the hollow fibers. The method is particularly useful for cleaning hemodialyzers used for dialysis and hollow fiber modules used in water treatment and separations. The two phase flow method is specifically effective in cleaning piping systems having high length to diameter (l/d) ratios.Type: ApplicationFiled: February 7, 2005Publication date: July 14, 2005Applicant: Princeton Trade and Technology, Inc.Inventors: Yacoob Tabani, Mohamed Labib
-
Publication number: 20050126599Abstract: A method of cleaning surfaces using a mixed phase cleaning mixture of an aqueous solution and a flow of gas sufficient to produce droplets of the liquid which are entrained by the gas for a time sufficient to clean tubing of various lengths and geometries and porous membranes to remove biofilm, debris and contaminants.Type: ApplicationFiled: February 7, 2005Publication date: June 16, 2005Applicant: Princeton Trade and Technology, Inc.Inventors: Mohamed Labib, Ching-Yue Lai, Peter Materna, Geoffrey Mahon
-
Patent number: 6905550Abstract: Removal of water-insoluble organic residues from inorganic surfaces can be accomplished in aqueous cleaning solutions containing an oxidant at a preselected temperature wherein the pH is adjusted with respect to the isoelectric point of the surface material to be removed so that the pH is above the pK, and the isoelectric point of the surface for acid materials, and below the PKa and the isoelectric point of the surface for basic materials. Surfactants can also be added to the cleaning solution.Type: GrantFiled: November 19, 1997Date of Patent: June 14, 2005Assignee: Princeton Trade & Technology, Inc.Inventor: Mohamed Emam Labib
-
Patent number: 6857436Abstract: A method of cleaning surfaces using a mixed phase cleaning mixture of an aqueous solution and a flow of gas sufficient to produce droplets of the liquid which are entrained by the gas for a time sufficient to clean tubing of various lengths and geometries and porous membranes to remove biofilm, debris and contaminants.Type: GrantFiled: July 16, 2002Date of Patent: February 22, 2005Assignee: Princeton Trade & Technology, Inc.Inventors: Mohamed Emam Labib, Ching-Yue Lai, Peter A. Materna, Geoffrey Lawrence Mahon
-
Patent number: 6619302Abstract: Biofilm and debris can be removed from the interior and exterior surfaces of small bore tubing by passing an aqueous cleaning solution of water, one or more surfactants and preferably a source of hydrogen peroxide, optionally including small inert solid particles, together with a gas under pressure, to create a turbulent flow within the tubing that loosens the biofilm and debris so that they can be flushed from the tubing. When the exterior surfaces of tubing are to be cleaned, the tubing is inserted in a sleeve fitted with an adaptor that provides a pressure-tight seal between the tubing and the sleeve.Type: GrantFiled: September 29, 1998Date of Patent: September 16, 2003Assignee: Princeton Trade & Technology, INCInventors: Mohamed Emam Labib, Ching-Yue Lai
-
Patent number: 6454871Abstract: A method of cleaning surfaces using a mixed phase cleaning mixture of an aqueous solution and a flow of gas sufficient to produce droplets of the liquid which are entrained by the gas for a time sufficient to clean tubing of various lengths and geometries and porous membranes to remove biofilm, debris and contaminants.Type: GrantFiled: December 17, 1999Date of Patent: September 24, 2002Assignee: Princeton Trade & Technology, Inc.Inventors: Mohamed Emam Labib, Ching-Yue Lai, Peter A. Materna, Geoffrey Lawrence Mahon