Patents by Inventor Sandip Tiwari

Sandip Tiwari 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: 12060656
    Abstract: A capillary type multi-jet nozzle is provided for fabricating high throughput nanofibers by an electrospinning technique. The capillary type multi-jet nozzle includes a cap system with one or more pores and a crew system with a screw groove system. The cap system and the crew system are connected through a cap and crew system. The pores in the cap system are customized in count based on a requirement. The angle between the pores is reduced to make multiple non-interfering and non-hindering jets in less time. A TEFLON® gasket is used for proper tightening and sealing of the cap system and screw system. The cap system includes knurling at an outer surface for grip. The capillary type multi-jet nozzle is made of a conducting material to with stand a high voltage and is fabricated using micro-machining process.
    Type: Grant
    Filed: November 11, 2019
    Date of Patent: August 13, 2024
    Inventors: Shivendu Ranjan, Mahesh Kumar, Ravindra Kumar, Upama Tiwari, Shivam Sachan, Sandip Patil
  • Patent number: 9895307
    Abstract: A personal care composition includes at least one end-functionalized ionic silicone and at least one film-forming agent.
    Type: Grant
    Filed: January 4, 2013
    Date of Patent: February 20, 2018
    Assignee: Momentive Performance Materials Inc.
    Inventors: Alok Sarkar, Anubhav Saxena, Sandip Tiwari, Benjamin Falk, Anne Dussaud
  • Patent number: 9895306
    Abstract: A personal care composition contains at least one personal care component and at least one end-functionalized ionic silicone.
    Type: Grant
    Filed: January 3, 2013
    Date of Patent: February 20, 2018
    Assignee: Momentive Performance Materials Inc.
    Inventors: Alok Sarkar, Anubhav Saxena, Sandip Tiwari, Benjamin Falk
  • Patent number: 9389511
    Abstract: A method for forming patterns of organic polymer materials. The method can be used to form a layer with two patterned organic polymer materials. The photoresist and solvents used in the photoresist deposition and removal steps do not substantially affect the organic polymer materials.
    Type: Grant
    Filed: March 19, 2012
    Date of Patent: July 12, 2016
    Assignee: Cornell University
    Inventors: Evan L. Schwartz, Wei Min Chan, Jin-Kyun Lee, Sandip Tiwari, Christopher K. Ober
  • Patent number: 8987701
    Abstract: In one embodiment there is set forth a method comprising providing a semiconductor structure having an electrode, wherein the providing includes providing a phase transition material region and wherein the method further includes imparting energy to the phase transition material region to induce a phase transition of the phase transition material region. By inducing a phase transition of the phase transition material region, a state of the semiconductor structure can be changed. There is further set forth an apparatus comprising a structure including an electrode and a phase transition material region, wherein the apparatus is operative for imparting energy to the phase transition material region to induce a phase transition of the phase transition material region without the phase transition of the phase transition material region being dependent on electron transport through the phase transition material region.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: March 24, 2015
    Assignee: Cornell University
    Inventors: Sandip Tiwari, Ravishankar Sundararaman, Sang Hyeon Lee, Moonkyung Kim
  • Patent number: 8974775
    Abstract: There is provided herein a functionalized ionic silicone composition comprising a silicone of the formula (I): M1aM2bM3cD1dD2eD3fT1gT2hT3iQj??(I) which contains a monovalent radical bearing ion-pairs and having the formula (II): -A-Ix?Mny+; where A is a spacing group having at least 2 spacing atoms selected from a divalent hydrocarbon or hydrocarbonoxy group, where I is an ionic group such as sulfonate —SO3?, carboxylate —COO?, phosphonate —PO32? group and phosphate —OPO32?, where M is hydrogen or a cation independently selected from alkali metals, alkali earth metals, transition metals, metals, quaternary ammonium and phosphonium groups; or, zwitterions having the formula (III): —R?—NR?2+—R??—I??(III) where I is defined as above, and where the subscript a, b, c, d, e, f, g, h, i, j are zero or positive subject to the following limitations: 2?a+b+c+d+e+f+g+h+i+j?6000, b+e+h>0 and c+f+i>0.
    Type: Grant
    Filed: January 4, 2012
    Date of Patent: March 10, 2015
    Assignee: Momentive Performance Materials Inc.
    Inventors: Anubhav Saxena, Alok Sarkar, Sandip Tiwari
  • Patent number: 8893310
    Abstract: A probe for scanned probe microscopy is provided. The probe includes a cantilever beam and a tip. The cantilever beam extends along a generally horizontal axis. The cantilever beam has a crystal facet surface that is oriented at a tilt angle with respect to the generally horizontal axis. The tip projects outwardly from the crystal facet surface.
    Type: Grant
    Filed: July 2, 2012
    Date of Patent: November 18, 2014
    Assignees: International Business Machines Corporation, Cornell University
    Inventors: Mark C. Reuter, Brian A. Bryce, Bojan R. Ilic, Sandip Tiwari
  • Publication number: 20140205818
    Abstract: A method for forming patterns of organic polymer materials. The method can be used to form a layer with two patterned organic polymer materials. The photoresist and solvents used in the photoresist deposition and removal steps do not substantially affect the organic polymer materials.
    Type: Application
    Filed: March 19, 2012
    Publication date: July 24, 2014
    Applicant: Conrnell University
    Inventors: Evan L. Schwartz, Wei Min Chan, Jin-Kyun Lee, Sandip Tiwari, Christopher K. Ober
  • Publication number: 20140017188
    Abstract: A personal care composition includes at least one end-functionalized ionic silicone and at least one film-forming agent.
    Type: Application
    Filed: January 4, 2013
    Publication date: January 16, 2014
    Inventors: Alok Sarkar, Anubhav Saxena, Sandip Tiwari, Benjamin Falk, Anne Dussaud
  • Publication number: 20140007308
    Abstract: A probe for scanned probe microscopy is provided. The probe includes a cantilever beam and a tip. The cantilever beam extends along a generally horizontal axis. The cantilever beam has a crystal facet surface that is oriented at a tilt angle with respect to the generally horizontal axis. The tip projects outwardly from the crystal facet surface.
    Type: Application
    Filed: July 2, 2012
    Publication date: January 2, 2014
    Applicants: CORNELL UNIVERSITY, INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Mark C. Reuter, Brian A. Bryce, Bojan R. Ilic, Sandip Tiwari
  • Patent number: 8553455
    Abstract: Mechanical devices having bistable positions are utilized to form switches and memory devices. The devices are actuatable to different positions and may be coupled to a transistor device in various configurations to provide memory devices. Actuation mechanisms include electrostatic methods and heat. In one form, the mechanical device forms a gate for a field effect transistor. In a further form, the device may be a switch that may be coupled to the transistor in various manners to affect its electrical characteristics when on and off. The memory switch in one embodiment comprises side walls formed with tensile or compressive films. A cross point switch is formed from a plurality of intersecting conductive rows and columns of conductors. Actuatable switches are positioned between each intersection of the rows and columns such that each intersection is independently addressable.
    Type: Grant
    Filed: September 27, 2006
    Date of Patent: October 8, 2013
    Assignees: Cornell Research Foundation, Inc., Samsung Electronics Co., Ltd.
    Inventors: Sandip Tiwari, Chung Woo Kim
  • Patent number: 8539611
    Abstract: A method of creating a probe for scanned probe microscopy is disclosed. The method includes providing a wafer having a support wafer layer and a device layer. The method includes masking the wafer with a masking layer. The method includes removing a portion of the masking layer at the device layer. The method includes etching the wafer along the portion of the masking layer that has been removed to create a crystal facet surface that is oriented at a tilt angle. The method includes epitaxially growing a tip along the crystal facet surface.
    Type: Grant
    Filed: July 12, 2012
    Date of Patent: September 17, 2013
    Assignees: International Business Machines Corporation, Cornell University
    Inventors: Mark C. Reuter, Brian A. Bryce, Bojan R. Ilic, Sandip Tiwari
  • Publication number: 20130172193
    Abstract: There is provided herein a functionalized ionic silicone composition comprising a silicone of the formula (I): M1aM2bM3cD1dD2eD3fT1gT2hT3iQj??(I) which contains a monovalent radical bearing ion-pairs and having the formula (II): -A-Ix-Mny+; where A is a spacing group having at least 2 spacing atoms selected from a divalent hydrocarbon or hydrocarbonoxy group, where I is an ionic group such as sulfonate —SO3?, carboxylate —COO?, phosphonate —PO32? group and phosphate —OPO32?, where M is hydrogen or a cation independently selected from alkali metals, alkali earth metals, transition metals, metals, quaternary ammonium and phosphonium groups; or, zwitterions having the formula (III): —R?—NR?2+—R??—I??(III) where I is defined as above, and where the subscript a, b, c, d, e, f, g, h, i, j are zero or positive subject to the following limitations: 2?a+b+c+d+e+f+g+h+i+j?6000, b+e+h>0 and c+f+i>0.
    Type: Application
    Filed: January 4, 2012
    Publication date: July 4, 2013
    Applicant: Momentive Performance Materials Inc.
    Inventors: Anubhav Saxena, Alok Sarkar, Sandip Tiwari
  • Publication number: 20120280301
    Abstract: In one embodiment there is set forth a method comprising providing a semiconductor structure having an electrode, wherein the providing includes providing a phase transition material region and wherein the method further includes imparting energy to the phase transition material region to induce a phase transition of the phase transition material region. By inducing a phase transition of the phase transition material region, a state of the semiconductor structure can be changed. There is further set forth an apparatus comprising a structure including an electrode and a phase transition material region, wherein the apparatus is operative for imparting energy to the phase transition material region to induce a phase transition of the phase transition material region without the phase transition of the phase transition material region being dependent on electron transport through the phase transition material region.
    Type: Application
    Filed: May 28, 2010
    Publication date: November 8, 2012
    Applicant: CORNELL UNIVERSITY
    Inventors: Sandip Tiwari, Ravishankar Sundararaman, Sang Hyeon Lee, Moonkyung Kim
  • Patent number: 8080839
    Abstract: An electro-mechanical transistor includes a source electrode and a drain electrode spaced apart from each other. A source pillar is between the substrate and the source electrode. A drain pillar is between the substrate and the drain electrode. A moveable channel is spaced apart from the source electrode and the drain electrode. A gate nano-pillar is between the moveable channel and the substrate. A first dielectric layer is between the moveable channel and the gate nano-pillar. A second dielectric layer is between the source pillar and the source electrode. A third dielectric layer is between the drain pillar and the drain electrode.
    Type: Grant
    Filed: August 28, 2009
    Date of Patent: December 20, 2011
    Assignee: Samsung Electronics Co. Ltd.
    Inventors: Sandip Tiwari, Moon-Kyung Kim, Joshua Mark Rubin, Soo-Doo Chae, Choong-Man Lee, Ravishankar Sundararaman
  • Publication number: 20110049650
    Abstract: An electromechanical transistor includes a source electrode and a drain electrode spaced apart from each other. A source pillar is between the substrate and the source electrode. A drain pillar is between the substrate and the drain electrode. A moveable channel is spaced apart from the source electrode and the drain electrode. A gate nano-pillar is between the moveable channel and the substrate. A first dielectric layer is between the moveable channel and the gate nano-pillar. A second dielectric layer is between the source pillar and the source electrode. A third dielectric layer is between the drain pillar and the drain electrode.
    Type: Application
    Filed: August 28, 2009
    Publication date: March 3, 2011
    Inventors: Sandip Tiwari, Moon-Kyung Kim, Joshua Mark Rubin, Soo-Doo Chae, Choong-Man Lee, Ravishankar Sundararaman
  • Patent number: 7365398
    Abstract: A highly dense form of static random-access memory (SRAM) takes advantage of transistor gates on both sides of silicon and high interconnectivity made possible by the complex form of silicon-on-insulator and three-dimensional integration. This technology allows one to form p-channel and n-channel devices very compactly by taking advantage of placement of gates on both sides, making common contacts and dense interconnections in 3D.
    Type: Grant
    Filed: February 11, 2005
    Date of Patent: April 29, 2008
    Assignee: Cornell Research Foundation, Inc.
    Inventors: Sandip Tiwari, Arvind Kumar
  • Publication number: 20070148194
    Abstract: An oil-in-water nanoemulsion delivery system that includes at least one oil having a concentration of greater than or equal to 2% (w/w) of at least one polyunsaturated fatty acid, preferably of the omega-3 or omega-6 family, is disclosed. The delivery system further includes at least one emulsifier and also an aqueous phase. Preferably, one or more hydrophobic therapeutic, monitoring and/or diagnostic agents are dispersed in the oil phase. The nanoemulsions may optionally contain other conventional pharmaceutical aids such as stabilizers, preservatives, buffering agents, antioxidants, polymers, proteins and charge inducing agents. The invention also relates to a process for preparing the nanoemulsions and to their use in the oral, parenteral, opthalmic, nasal, rectal or topical delivery of hydrophobic therapeutic, monitoring or diagnostic agents.
    Type: Application
    Filed: November 29, 2006
    Publication date: June 28, 2007
    Inventors: Mansoor Amiji, Sandip Tiwari
  • Publication number: 20070086237
    Abstract: Mechanical devices having bistable positions are utilized to form switches and memory devices. The devices are actuatable to different positions and may be coupled to a transistor device in various configurations to provide memory devices. Actuation mechanisms include electrostatic methods and heat. In one form, the mechanical device forms a gate for a field effect transistor. In a further form, the device may be a switch that may be coupled to the transistor in various manners to affect its electrical characteristics when on and off. The memory switch in one embodiment comprises side walls formed with tensile or compressive films. A cross point switch is formed from a plurality of intersecting conductive rows and columns of conductors. Actuatable switches are positioned between each intersection of the rows and columns such that each intersection is independently addressable.
    Type: Application
    Filed: September 27, 2006
    Publication date: April 19, 2007
    Inventors: Sandip Tiwari, Chung Kim
  • Patent number: 7057234
    Abstract: According to an aspect of the invention, a device structure is provided where charging and discharging occur in a trapping region formed by a stack of films that is placed on the back of a thin silicon channel. Uncoupling the charging mechanisms that lead to the memory function from the front gate transistor operation allows efficient scaling of the front gate. But significantly more important is a unique character of these devices: these structures can be operated both as a transistor and as a memory. The thin active silicon channel and the thin front oxide provide the capability of scaling the structure to tens of nanometers, and the dual function of the device is obtained by using two voltage ranges that are clearly distinct. At small voltages the structure operates as a normal transistor, and at higher voltages the structure operates as a memory device.
    Type: Grant
    Filed: June 16, 2003
    Date of Patent: June 6, 2006
    Assignee: Cornell Research Foundation, Inc.
    Inventor: Sandip Tiwari