Patents by Inventor Darsh T. Wasan

Darsh T. Wasan 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: 20120175120
    Abstract: Nanoparticles are added to a fluid containing a wetting agent and the fluid is pumped down a well to enhance wetting of solid surfaces in and around the well before pumping an acid solution down the well. After acid is pumped, a fluid containing nanoparticles and wetting agent is again pumped down the well, leading to improved flow capacity of the well.
    Type: Application
    Filed: March 21, 2012
    Publication date: July 12, 2012
    Applicants: ILLINOIS INSTITUTE OF TECHNOLOGY, FTS INTERNATIONAL SERVICES, LLC
    Inventors: David L. Holcomb, Darsh T. Wasan, Alex D. Nikolov
  • Publication number: 20120168165
    Abstract: Nanoparticles are added to a fluid containing a wetting agent to enhance wetting of solid surfaces in and around the well and removing a water-block from the well. The wetting agent and nanoparticles combine to produce a wetting of the surfaces of the rock that allows recovery of the excess water near the well (water block).
    Type: Application
    Filed: March 21, 2012
    Publication date: July 5, 2012
    Applicants: ILLINOIS INSTITUTE OF TECHNOLOGY, FTS INTERNATIONAL SERVICES, LLC
    Inventors: David L. Holcomb, Darsh T. Wasan, Alex D. Nikolov
  • Publication number: 20100234263
    Abstract: A cleaning composition comprising from about 0.001% to about 25% of nanoparticles comprising a water insoluble metal or semimetal compound having an effective diameter of less than about 65 nanometers, a grass stain removal index greater than 0 and a grease stain removal index greater than 0; and adjunct ingredients.
    Type: Application
    Filed: March 21, 2007
    Publication date: September 16, 2010
    Applicants: THE PROCTER & GAMBLE COMPANY, ILLINOIS INSTITUTE OF TECHNOLOGY
    Inventors: Darsh T. Wasan, Alex D. Nikolov, Michael Ray McDonald, Stacie Ellen Hecht
  • Publication number: 20100096139
    Abstract: Methods are provided for improved intervention processes in a well. Nanoparticles are added to a fluid containing a wetting agent to enhance wetting of solid surfaces in and around the well, leading to improved flow capacity of the well.
    Type: Application
    Filed: October 15, 2009
    Publication date: April 22, 2010
    Applicants: FRAC TECH SERVICES, LTD., ILLINOIS INSTITUTE OF TECHNOLOGY
    Inventors: David L. Holcomb, Darsh T. Wasan, Alex D. Nikolov
  • Publication number: 20090090387
    Abstract: Methods of removing cooked-, baked-, or burnt-on food soil from cookware and tableware comprising washing the cookware/tableware in an automatic dishwashing machine in the presence of a wash liquor comprising nanoparticles is disclosed herein.
    Type: Application
    Filed: March 20, 2007
    Publication date: April 9, 2009
    Applicants: THE PROCTER & GAMBLE COMPANY, ILLINOIS INSTITUTE OF TECHNOLOGY
    Inventors: Anju D. Massey Brooker, Nigel Patrick Somerville Roberts, David W. York, Yulong Ding, Darsh T. Wasan, Alex D. Nikolov
  • Patent number: 5438041
    Abstract: A process is provided wherein hemoglobin, a fragile material, is formulated into high hemoglobin content water-in-oil-in-water multiple emulsion while maintaining high yields and high oxygen exchange activity. A multiple emulsion of aqueous oxygen carrying material in oil in outer aqueous phase is suitable for provision of oxygen for oxygen transfer processes. A hemoglobin multiple emulsion in physiologically compatible oil in an outer aqueous saline solution is provided in sufficiently small droplet size to provide oxygen flow through blood vessels to desired body tissues or organs thereby providing a blood substitute.
    Type: Grant
    Filed: March 3, 1993
    Date of Patent: August 1, 1995
    Assignees: Illinois Institute of Technology, Northfield Laboratories, Inc.
    Inventors: Shuming Zheng, Richard L. Beissinger, Darsh T. Wasan, Lakshman R. Sehgal, Arthur L. Rosen
  • Patent number: 5217648
    Abstract: A process is provided wherein hemoglobin, a fragile material, is formulated into high hemoglobin content water-in-oil-in-water multiple emulsion while maintaining high yields and high oxygen exchange activity. A multiple emulsion of aqueous oxygen carrying material in oil in outer aqueous phase is suitable for provision of oxygen for oxygen transfer processes. A hemoglobin multiple emulsion in physiologically compatible oil in an outer aqueous saline solution is provided in sufficiently small droplet size to provide oxygen flow through blood vessels to desired body tissues or organs thereby providing a blood substitute.
    Type: Grant
    Filed: October 11, 1991
    Date of Patent: June 8, 1993
    Assignees: Illinois Institute of Technology, Northfield Laboratories, Inc.
    Inventors: Richard L. Beissinger, Darsh T. Wasan, Lakshman R. Sehgal, Arthur L. Rosen
  • Patent number: 5061688
    Abstract: A multiple emulsion of aqueous oxygen carrying material in oil in outer aqueous phase is suitable for provision of oxygen for oxygen transfer processes. A hemoglobin multiple emulsion in physiologically compatible oil in an outer aqueous saline solution is provided in sufficiently small droplet size to provide oxygen flow through blood vessels to desired body tissues or organs thereby providing a blood substitute. A process is provided wherein hemoglobin, a fragile material, is formulated into high hemoglobin content water-in-oil-in-water multiple emulsions while maintaining high yields and high oxygen exchange activity.
    Type: Grant
    Filed: August 19, 1988
    Date of Patent: October 29, 1991
    Assignees: Illinois Institute of Technology, Northfield Laboratories, Inc.
    Inventors: Richard L. Beissinger, Darsh T. Wasan, Lahksman R. Sehgal, Arthur L. Rosen
  • Patent number: 4248686
    Abstract: A filter for clarifying carbonaceous liquids containing finely divided solid particles of, for instance, unreacted coal, ash and other solids discharged from a coal liquefaction process is presented. The filter includes two passageways separated by a porous filter medium. In one preferred embodiment the filter medium is of tubular shape to form the first passageway and is enclosed within an outer housing to form the second passageway within the annulus. An electrode disposed in the first passageway, for instance along the tube axis, is connected to a source of high voltage for establishing an electric field between the electrode and the filter medium. Slurry feed flows through the first passageway tangentially to the surfaces of the filter medium and the electrode. Particles from the feed slurry are attracted to the electrode within the first passageway to prevent plugging of the porous filter medium while carbonaceous liquid filters into the second passageway for withdrawal.
    Type: Grant
    Filed: December 6, 1979
    Date of Patent: February 3, 1981
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Dimitri Gidaspow, Chang H. Lee, Darsh T. Wasan
  • Patent number: 4224135
    Abstract: A filter for clarifying carbonaceous liquids containing finely divided solid particles of, for instance, unreacted coal, ash and other solids discharged from a coal liquefaction process is presented. The filter includes two passageways separated by a porous filter medium. In one preferred embodiment the filter medium is of tubular shape to form the first passageway and is enclosed within an outer housing to form the second passageway within the annulus. An electrode disposed in the first passageway, for instance along the tube axis, is connected to a source of high voltage for establishing an electric field between the electrode and the filter medium. Slurry feed flows through the first passageway tangentially to the surfaces of the filter medium and the electrode. Particles from the feed slurry are attracted to the electrode within the first passageway to prevent plugging of the porous filter medium while carbonaceous liquid filters into the second passageway for withdrawal.
    Type: Grant
    Filed: November 1, 1978
    Date of Patent: September 23, 1980
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Dimitri Gidaspow, Chang H. Lee, Darsh T. Wasan