Patents by Inventor Diptabhas Sarkar

Diptabhas Sarkar 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: 10859493
    Abstract: An SPR detection apparatus has an optical system with a sensor member including a planar metallic layer, the sensor member being removably mountable to a housing. First optics direct an incident beam toward a rear side of the metallic layer at a predetermined range of angles to a normal to the sensor layer. Second optics guide at least one reflected beam, corresponding to the incident beam, from the metallic layer to the transducer. The transducer converts incoming electromagnetic radiation to an electrical signal for transmission to a signal processor disposed in the housing and operatively connected to the at least one opto-electrical transducer so as to detect a surface plasmon resonance angle. The first optics are configured so that the at least one incident beam spans at least about 20°.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: December 8, 2020
    Assignee: LACRISCIENCES, LLC
    Inventors: Anthony P. Cappo, Diptabhas Sarkar, Paul T. Gavaris, Chris D. Geddes, Ali H. Ghovanlou
  • Patent number: 10377938
    Abstract: The present invention relates to nanoparticle smart tags and the use of nanoparticle smart tags in the detection of analyte. In particular, the present invention relates to nanoparticle smart tags that may be used in subgeologic formations to detect analytes of interest in real-time. One embodiment of the present invention provides a method of providing a drilling fluid having a nanoparticle smart tag; and a base fluid; and introducing the drilling fluid in a subsurface geologic formation that has an analyte.
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: August 13, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Diptabhas Sarkar, Charles Landis, Ryan P. Collins
  • Publication number: 20130109597
    Abstract: The present invention relates to nanoparticle smart tags and the use of nanoparticle smart tags in the detection of analyte. In particular, the present invention relates to nanoparticle smart tags that may be used in subgeologic formations to detect analytes of interest in real-time. One embodiment of the present invention provides a suspension having a nanoparticle smart tag analyte complex formed by an interaction having a nanoparticle smart tag and an analyte; and a subterranean treatment fluid.
    Type: Application
    Filed: October 31, 2011
    Publication date: May 2, 2013
    Applicant: Halliburton Energy Services, Inc.
    Inventors: Diptabhas Sarkar, Charles R. Landis, Ryan P. Collins
  • Publication number: 20130109100
    Abstract: The present invention relates to nanoparticle smart tags and the use of nanoparticle smart tags in the detection of analyte. In particular, the present invention relates to nanoparticle smart tags that may be used in subgeologic formations to detect analytes of interest in real-time. One embodiment of the present invention provides a method of providing a drilling fluid having a nanoparticle smart tag; and a base fluid; and introducing the drilling fluid in a subsurface geologic formation that has an analyte.
    Type: Application
    Filed: October 31, 2011
    Publication date: May 2, 2013
    Applicant: Halliburton Energy Services, Inc.
    Inventors: Diptabhas Sarkar, Charles R. Landis, Ryan P. Collins
  • Patent number: 8249682
    Abstract: A medical diagnostic method utilizes a surface plasmon resonance apparatus provided with a sensing surface. A tear sample from an eye of a patient is placed into contact with the sensing surface. The surface plasmon resonance apparatus is then operated to determine concentrations of solutes such as salt and antigenic analytes in the tear sample.
    Type: Grant
    Filed: September 6, 2007
    Date of Patent: August 21, 2012
    Assignee: Lacrisciences, LLC
    Inventors: Anthony P. Cappo, Gregory Bennett, Jeffrey P Gilbard, Paul T Gavaris, Diptabhas Sarkar
  • Publication number: 20120181014
    Abstract: A system for servicing a wellbore, comprising a water source, a first water stream from the water source comprising undissolved solids, dissolved organics and undissolved organics, the first water stream being introduced into a mobile electrocoagulation unit, a second water stream comprising coalesced undissolved solids, coalesced undissolved organics and dissolved organics, the second water stream being emitted from the electrocoagulation unit and introduced into a mobile separation unit, a third water stream comprising dissolved organics, the third water stream being emitted from the separation unit, an ozone stream emitted from a mobile ozone generator and added to the third water stream comprising dissolved organics to form an ozonated water stream comprising dissolved organics, the ozonated water stream comprising dissolved organics being introduced into a mobile ultraviolet irradiation unit, a fourth water stream substantially free of undissolved solids, facilely-oxidizable organics and active microorga
    Type: Application
    Filed: January 14, 2011
    Publication date: July 19, 2012
    Applicant: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: Rory DAUSSIN, Diptabhas SARKAR, Phillip C. HARRIS
  • Publication number: 20120181028
    Abstract: A method of servicing a wellbore, comprising transporting a plurality of wellbore servicing equipment to a well site associated with the wellbore, accessing a water source to form a water stream from the water source to at least one of the plurality of wellbore servicing equipment, passing a direct electrical current through the water stream obtained from the water source to coalesce an undissolved solid phase and an undissolved organic phase in the water stream, separating the coalesced undissolved solid phase and the coalesced undissolved organic phase from the water stream to yield a substantially single-phase water stream, adding ozone to the substantially single-phase water stream to yield an ozonated water stream, irradiating the ozonated water stream with ultraviolet light to yield an irradiated water stream, forming a wellbore servicing fluid using the irradiated water stream, and placing the wellbore servicing fluid into the wellbore.
    Type: Application
    Filed: January 14, 2011
    Publication date: July 19, 2012
    Applicant: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: Rory DAUSSIN, Diptabhas SARKAR, Phillip C. HARRIS
  • Publication number: 20110220371
    Abstract: A method of treating a fluid, comprising treating a fluid by adding ozone to the fluid and exposing the fluid to ultraviolet radiation, and producing a wellbore servicing fluid using the treated fluid. A mobile apparatus for treating a wellbore servicing fluid, comprising a fluid flow path comprising an upstream end and a downstream end, the fluid flow path being configured to allow passage of the fluid therethrough, an ozone inlet configured to allow introduction of ozone into the fluid flow path, a source of ultraviolet radiation associated with the fluid flow path so that ultraviolet radiation generated by the source of ultraviolet radiation is introduced into the fluid flow path, and wherein the fluid flow path is configured to treat a fluid at a rate of at least about 25 to about 100 barrels per minute.
    Type: Application
    Filed: March 11, 2010
    Publication date: September 15, 2011
    Applicant: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: Rory D. Daussin, Diptabhas Sarkar
  • Patent number: 7624743
    Abstract: Methods are provided for increasing the temperature of a section of conduit used for the production or transmission of hydrocarbon. According to one aspect, the method includes the steps of: (a) forming a treatment fluid comprising: (i) a carrier fluid; and (ii) a first reactant and a second reactant; and (b) introducing the treatment fluid into a section of conduit used for the production or transmission of hydrocarbon. The first reactant and second reactant are selected for being capable of reacting together in an exothermic chemical reaction; and the first and second reactant are in at least sufficient concentrations in the carrier fluid to generate a theoretical heat of reaction of at least 1,000 kJ/liter of the treatment fluid. At least some of at least one of the first reactant and the second reactant is suspended in the carrier fluid in a solid form that is adapted to help control the release of the reactant into the carrier fluid.
    Type: Grant
    Filed: September 14, 2006
    Date of Patent: December 1, 2009
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Diptabhas Sarkar, Stephen T. Arrington, Ronald J. Powell, Ian D. Robb, Bradley L. Todd
  • Publication number: 20090205675
    Abstract: An improved method and system for removing blockage from hydrocarbon transfer conduits. An apparatus and methods for cleaning a hydrocarbon transfer conduit is disclosed whereby a laser head is placed in a hydrocarbon transfer conduit to be cleaned and supplied with a laser beam. The laser head applies the laser beam to an area in the hydrocarbon transfer conduit to be cleaned.
    Type: Application
    Filed: February 18, 2008
    Publication date: August 20, 2009
    Inventors: Diptabhas Sarkar, Lewis Norman, Laurence Abney
  • Publication number: 20090005660
    Abstract: A medical diagnostic method utilizes a surface plasmon resonance apparatus provided with a sensing surface. A tear sample from an eye of a patient is placed into contact with the sensing surface. The surface plasmon resonance apparatus is then operated to determine concentrations of solutes such as salt and antigenic analytes in the tear sample.
    Type: Application
    Filed: September 6, 2007
    Publication date: January 1, 2009
    Inventors: Anthony P. Cappo, Gregory Bennett, Jeffrey P. Gilbard, Paul T. Gavaris, Diptabhas Sarkar
  • Publication number: 20080067108
    Abstract: Methods are provided for increasing the temperature of a section of conduit used for the production or transmission of hydrocarbon. According to one aspect, a method is provided for increasing the temperature of a section of conduit used for the production or transmission of hydrocarbon, the method comprising the steps of: forming a treatment fluid comprising: (i) a carrier fluid; (ii) a first reactant and a second reactant, wherein the first reactant and second reactant are selected for being capable of reacting together in an exothermic chemical reaction; the first and second reactant are in at least sufficient concentrations in the carrier fluid to generate a theoretical heat of reaction of at least 1,000 kJ/liter of the treatment fluid; and (iii) a catalyst for the reaction between the first reactant and the second reactant, wherein at least some of the catalyst is suspended in the carrier fluid in a solid form that is adapted to help control the release of the catalyst into the carrier fluid.
    Type: Application
    Filed: September 14, 2006
    Publication date: March 20, 2008
    Inventors: Diptabhas Sarkar, Stephen T. Arrington, Ronald J. Powell, Ian D. Robb, Bradley L. Todd
  • Publication number: 20080069961
    Abstract: Methods and compositions are provided for making a solid material for controlling the release of at least one reactant of an exothermic reaction into a carrier fluid. The method comprises the steps of: (a) mixing a reactant with a polymeric material, wherein the polymeric material is capable of being hydrated, and water, wherein the proportion of water is insufficient to substantially hydrate the polymeric material but is sufficient to make the polymeric material sticky to help bind the reactant into a matrix; and (b) drying the mixture. According to a similar aspect, methods and compositions are provided for making a solid material for use in controlling the release of a catalyst of an exothermic reaction into a carrier fluid for increasing the temperature of a section of conduit used for the production or transmission of hydrocarbon. According to other aspects, the reactant or catalyst is mixed with a binder.
    Type: Application
    Filed: September 14, 2006
    Publication date: March 20, 2008
    Inventors: Diptabhas Sarkar, Stephen T. Arrington, Ronald J. Powell, Ian D. Robb, Bradley L. Todd
  • Publication number: 20080066784
    Abstract: Methods are provided for increasing the temperature of a section of conduit used for the production or transmission of hydrocarbon. According to one aspect, the method includes the steps of: (a) forming a treatment fluid comprising: (i) a carrier fluid; and (ii) a first reactant and a second reactant; and (b) introducing the treatment fluid into a section of conduit used for the production or transmission of hydrocarbon. The first reactant and second reactant are selected for being capable of reacting together in an exothermic chemical reaction; and the first and second reactant are in at least sufficient concentrations in the carrier fluid to generate a theoretical heat of reaction of at least 1,000 kJ/liter of the treatment fluid. At least some of at least one of the first reactant and the second reactant is suspended in the carrier fluid in a solid form that is adapted to help control the release of the reactant into the carrier fluid.
    Type: Application
    Filed: September 14, 2006
    Publication date: March 20, 2008
    Inventors: Diptabhas Sarkar, Stephen T. Arrington, Ronald J. Powell, Ian D. Robb, Bradley L. Todd
  • Patent number: 7306040
    Abstract: Some methods are provided that comprise: providing a treatment fluid comprising an aqueous fluid, and a stimuli-degradable gel formed by a reaction comprising a gelling agent, and a stimuli-degradable cross linking agent that includes at least one degradable group and two unsaturated terminal groups; placing the treatment fluid into a subterranean formation; and allowing the stimuli-degradable gel to degrade.
    Type: Grant
    Filed: June 2, 2006
    Date of Patent: December 11, 2007
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Ian D. Robb, Rajesh K. Saini, Diptabhas Sarkar, Bradley L. Todd, James M. Griffin
  • Publication number: 20070281870
    Abstract: Treatment fluids comprising: an aqueous base fluid; and a stimuli-degradable gel formed by a reaction comprising a gelling agent; and a stimuli-degradable cross linking agent described by the following formula: R1-[A]-[R3—[B]—R2 wherein R1 and R2 may be the same or different, and are selected from the group consisting of: substituted or unsubstituted ethylenically unsaturated groups, N-acryl, O-acryl, acrylol, vinyl, allyl, maleimide, and derivatives or combinations thereof; A and B are optional bridging units; and R3 is a degradable group or polymer.
    Type: Application
    Filed: June 2, 2006
    Publication date: December 6, 2007
    Inventors: Ian D. Robb, Rajesh K. Saini, Diptabhas Sarkar, Bradley L. Todd, James M. Griffin
  • Publication number: 20070277981
    Abstract: Some methods are provided that comprise: providing a treatment fluid comprising an aqueous fluid, and a stimuli-degradable gel formed by a reaction comprising a gelling agent, and a stimuli-degradable cross linking agent that includes at least one degradable group and two unsaturated terminal groups; placing the treatment fluid into a subterranean formation; and allowing the stimuli-degradable gel to degrade.
    Type: Application
    Filed: June 2, 2006
    Publication date: December 6, 2007
    Inventors: Ian D. Robb, Rajesh K. Saini, Diptabhas Sarkar, Bradley L. Todd, James M. Griffin
  • Publication number: 20070123433
    Abstract: The invention provides a treatment fluid for treating a subterranean formation penetrated by a wellbore, the treatment fluid comprising: (i) an aqueous carrier fluid; (ii) a zeolite; (iii) a polymeric gelling material; and (iv) a delayed release acid. The invention also provides a method for treating a subterranean formation penetrated by a wellbore, the method comprising the steps of pumping a treatment fluid comprising: (i) an aqueous carrier fluid; (ii) a zeolite; (iii) a polymeric gelling material; and (iv) a delayed release acid; and introducing the treatment fluid into the wellbore.
    Type: Application
    Filed: November 30, 2005
    Publication date: May 31, 2007
    Inventors: Diptabhas Sarkar, Ian Robb, Bradley Todd