Patents by Inventor Vivek Subramanian

Vivek Subramanian 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: 7528017
    Abstract: Process variation-tolerant diodes and diode-connected thin film transistors (TFTs), printed or patterned structures (e.g., circuitry) containing such diodes and TFTs, methods of making the same, and applications of the same for identification tags and sensors are disclosed. A patterned structure comprising a complementary pair of diodes or diode-connected TFTs in series can stabilize the threshold voltage (Vt) of a diode manufactured using printing or laser writing techniques. The present invention advantageously utilizes the separation between the Vt of an NMOS TFT (Vtn) and the Vt of a PMOS TFT (Vtp) to establish and/or improve stability of a forward voltage drop across a printed or laser-written diode. Further applications of the present invention relate to reference voltage generators, voltage clamp circuits, methods of controlling voltages on related or differential signal transmission lines, and RFID and EAS tags and sensors.
    Type: Grant
    Filed: September 15, 2006
    Date of Patent: May 5, 2009
    Assignee: Kovio, Inc.
    Inventors: Vivek Subramanian, Patrick Smith
  • Publication number: 20090109035
    Abstract: The present invention relates to methods of making capacitors for use in surveillance/identification tags or devices, and methods of using such surveillance/identification devices. The capacitors manufactured according to the methods of the present invention and used in the surveillance/identification devices described herein comprise printed conductive and dielectric layers. The methods and devices of the present invention improve the manufacturing tolerances associated with conventional metal-plastic-metal capacitor, as well as the deactivation reliability of the capacitor used in a surveillance/identification tag or device.
    Type: Application
    Filed: October 10, 2008
    Publication date: April 30, 2009
    Inventors: Vivek SUBRAMANIAN, Patrick Smith, Vikram Pavate, Arvind Kamath, Criswell Choi, Aditi Chandra, James Montague Cleeves
  • Publication number: 20090095818
    Abstract: Printed integrated circuitry and attached antenna and/or inductor for sensors, electronic article surveillance (EAS), radio frequency (RF) and/or RF identification (RFID) tags and devices, and methods for its manufacture. The tag generally includes printed integrated circuitry on one carrier and an antenna and/or inductor on another carrier, the integrated circuitry being electrically coupled to the antenna and/or inductor. The method of manufacture generally includes of printing an integrated circuit having a plurality of first pads on a carrier, forming an antenna and/or inductor having a plurality of second pads on a substrate, and attaching at least two of the first pads of the printed integrated circuit to corresponding second pads of the antenna and/or inductor.
    Type: Application
    Filed: October 10, 2008
    Publication date: April 16, 2009
    Inventors: Patrick Smith, Criswell Choi, Vikram Pavate, James Montague Cleeves, Vivek Subramanian, Richard Young, Vince Biviano
  • Publication number: 20080259996
    Abstract: The invention relates to method of signaling temperature and/or benefit agent release using bar compositions comprising thermochromatic pigment or dye. In a preferred embodiment, the pigment is introduced in the form of a separate domain (e.g., separate chips) which separate chip or chips is combined with a surfactant-containing chips to form the final bar.
    Type: Application
    Filed: April 18, 2007
    Publication date: October 23, 2008
    Applicant: Conopco, Inc., d/b/a UNILEVER
    Inventors: Christine Marie Nixon Lee, Michael Augustine Brennan, Vivek Subramanian
  • Publication number: 20080261843
    Abstract: The invention relates to bar compositions comprising thermochromatic pigment or dye signaling temperature and/or benefit agent release. In a preferred embodiment, the pigment is introduced in the form of a separate domain (e.g., separate chips) which separate chip or chips is combined with a surfactant-containing chips to form the final bar.
    Type: Application
    Filed: April 18, 2007
    Publication date: October 23, 2008
    Applicant: Conopco, Inc, d/b/a UNILEVER
    Inventors: Christine Marie Nixon Lee, Michael Augustine Brennan, Vivek Subramanian
  • Publication number: 20080119027
    Abstract: A very high density field programmable memory is disclosed. An array is formed vertically above a substrate using several layers, each layer of which includes vertically fabricated memory cells. The cell in an N level array may be formed with N+1 masking steps plus masking steps needed for contacts. Maximum use of self alignment techniques minimizes photolithographic limitations. In one embodiment the peripheral circuits are formed in a silicon substrate and an N level array is fabricated above the substrate.
    Type: Application
    Filed: October 26, 2007
    Publication date: May 22, 2008
    Inventors: Vivek Subramanian, James M. Cleeves
  • Publication number: 20080088417
    Abstract: Multi-mode (e.g., EAS and RFID) tags and methods for making and using the same are disclosed. The tag generally includes an antenna, an electronic article surveillance (EAS) function block coupled to the antenna, and one or more identification function blocks coupled to the antenna in parallel with the EAS function block. The method of reading the tag generally includes the steps of applying an electric field to the tag, detecting the tag when the electric field has a relatively low power, and detecting an identification signal from the tag when the electric field has a relatively high power. The present invention advantageously enables a single tag to be used for both inventory and anti-theft purposes, thereby improving inventory management and control at reduced system and/or “per-article” costs.
    Type: Application
    Filed: October 11, 2007
    Publication date: April 17, 2008
    Inventors: Patrick SMITH, James Montague Cleeves, Vikram Pavate, Vivek Subramanian
  • Patent number: 7326672
    Abstract: The present invention relates to personal wash compositions comprising, non-silicate particles, wherein the basal layer(s) carries a net cationic charge. The use of these specific particles results in enhanced properties (e.g., enhanced foaming, hydrotroping) of the personal wash products. The invention further discloses process for decreasing viscosity and/or increasing foam comprising formulating compositions with non-silicate layer compounds as specified.
    Type: Grant
    Filed: July 29, 2004
    Date of Patent: February 5, 2008
    Inventors: Vivek Subramanian, Pravin Shah, Kavssery Parameswaran Ananthapadmanabhan
  • Patent number: 7319053
    Abstract: A very high density field programmable memory is disclosed. An array is formed vertically above a substrate using several layers, each layer of which includes vertically fabricated memory cells. The cell in an N level array may be formed with N+1 masking steps plus masking steps needed for contacts. Maximum use of self alignment techniques minimizes photolithographic limitations. In one embodiment the peripheral circuits are formed in a silicon substrate and an N level array is fabricated above the substrate.
    Type: Grant
    Filed: February 14, 2006
    Date of Patent: January 15, 2008
    Assignee: SanDisk 3D LLC
    Inventors: Vivek Subramanian, James M. Cleeves
  • Publication number: 20070299270
    Abstract: The invention relates to an improved process for oxidizing a primary amidoalcohol to the corresponding amidocarboxylic acid in high yield.
    Type: Application
    Filed: June 27, 2006
    Publication date: December 27, 2007
    Inventors: Bijan Harichian, Vivek Subramanian
  • Patent number: 7307187
    Abstract: The invention relates to an improved process for oxidizing a primary amidoalcohol to the corresponding amidocarboxylic acid in high yield.
    Type: Grant
    Filed: June 27, 2006
    Date of Patent: December 11, 2007
    Assignee: Conopco, Inc.
    Inventors: Bijan Harichian, Vivek Subramanian
  • Patent number: 7265000
    Abstract: A very high density field programmable memory is disclosed. An array is formed vertically above a substrate using several layers, each layer of which includes vertically fabricated memory cells. The cell in an N level array may be formed with N+1 masking steps plus masking steps needed for contacts. Maximum use of self alignment techniques minimizes photolithographic limitations. In one embodiment the peripheral circuits are formed in a silicon substrate and an N level array is fabricated above the substrate.
    Type: Grant
    Filed: February 14, 2006
    Date of Patent: September 4, 2007
    Assignee: SanDisk 3D LLC
    Inventors: Vivek Subramanian, James M. Cleeves
  • Publication number: 20070184995
    Abstract: The invention relates to non-aqueous personal wash compositions comprising little or no surfactant but which utilize a foam enhancing system to generate good levels of foam. The invention further relates to process for generating foam from such non-aqueous personal wash cleansers.
    Type: Application
    Filed: April 12, 2007
    Publication date: August 9, 2007
    Applicant: Unilever Home & Personal Care USA, Division of Conopco, Inc.
    Inventors: Pravin Shah, Vivek Subramanian, Judith Kerschner, Xiadong Zhang, Rajendra Dave, Frank Meyer
  • Publication number: 20070175296
    Abstract: Metallic nanoparticles are provided which can be used in forming metallic film conductors at reduced temperatures compatible with plastic carriers for the film conductors. This is realized by using a lower molecular weight organic encapsulant of the nanoparticle and thereby reducing the temperature at which the organic encapsulant evaporates. Further, the sintering or melting temperature of the metallic nanoparticle is reduced by using a lower sized nanoparticle, thereby increasing the particle surface area relative to the particle volume and thus reducing the required heat and melting temperature of the particle.
    Type: Application
    Filed: August 15, 2005
    Publication date: August 2, 2007
    Applicant: The Regents of the University of California
    Inventors: Vivek Subramanian, Daniel Huang, Steven Volkman, Frank Liao
  • Publication number: 20070126556
    Abstract: A method, algorithm, architecture, circuits, and/or systems for EAS, HF, UHF, and RFID designs suitable for multi-tag read applications using TTF anti-collision schemes are disclosed. In one embodiment, a tag for wirelessly communicating with a reader can include: (i) a memory portion with an identifier, the memory having at least one printed layer; and (ii) a circuit for providing a bit string followed by a predetermined silent period, where the bit string is related to the identifier. The tag can include pre-programmed memory bits (e.g., bits the value of which is programmed by printing), or alternatively, memory bits formed by conventional photolithography, but having connections made using printing technology to form the identifier, for example. A unique identifier for each tag or device used in a system under a given set of operating conditions can allow a reader to distinguish between them based on a length and/or value of a bit string, for example.
    Type: Application
    Filed: October 6, 2006
    Publication date: June 7, 2007
    Inventors: Vivek Subramanian, Vikram Pavate
  • Publication number: 20070128760
    Abstract: Process variation-tolerant diodes and diode-connected thin film transistors (TFTs), printed or patterned structures (e.g., circuitry) containing such diodes and TFTs, methods of making the same, and applications of the same for identification tags and sensors are disclosed. A patterned structure comprising a complementary pair of diodes or diode-connected TFTs in series can stabilize the threshold voltage (Vt) of a diode manufactured using printing or laser writing techniques. The present invention advantageously utilizes the separation between the Vt of an NMOS TFT (Vtn) and the Vt of a PMOS TFT (Vtp) to establish and/or improve stability of a forward voltage drop across a printed or laser-written diode. Further applications of the present invention relate to reference voltage generators, voltage clamp circuits, methods of controlling voltages on related or differential signal transmission lines, and RFID and EAS tags and sensors.
    Type: Application
    Filed: September 15, 2006
    Publication date: June 7, 2007
    Inventors: Vivek Subramanian, Patrick Smith
  • Patent number: 7160761
    Abstract: A very high density field programmable memory is disclosed. An array is formed vertically above a substrate using several layers, each layer of which includes vertically fabricated memory cells. The cell in an N level array may be formed with N+1 masking steps plus masking steps needed for contacts. Maximum use of self alignment techniques minimizes photolithographic limitations. In one embodiment the peripheral circuits are formed in a silicon substrate and an N level array is fabricated above the substrate.
    Type: Grant
    Filed: September 19, 2002
    Date of Patent: January 9, 2007
    Assignee: SanDisk 3D LLC
    Inventors: James M. Cleeves, Vivek Subramanian
  • Patent number: 7157314
    Abstract: A very high density field programmable memory is disclosed. An array is formed vertically above a substrate using several layers, each layer of which includes vertically fabricated memory cells. The cell in an N level array may be formed with N+1 masking steps plus masking steps needed for contacts. Maximum use of self alignment techniques minimizes photolithographic limitations. In one embodiment the peripheral circuits are formed in a silicon substrate and an N level array is fabricated above the substrate.
    Type: Grant
    Filed: August 24, 2001
    Date of Patent: January 2, 2007
    Assignee: SanDisk Corporation
    Inventors: Vivek Subramanian, James M. Cleeves
  • Publication number: 20060270572
    Abstract: The invention relates to novel bar compositions comprising complexes formed from interaction of multivalent ions and soap. The insoluble complexes permit greater solid contents which counterintuitively, enhance lather (i.e., even if soluble soap is complexed, it is believed more can be used). Further, the complexes enhance rate of wear, hardness, mildness and deposition. The invention further comprises process for enhancing benefits by adding multivalent ions to soap stock during processing.
    Type: Application
    Filed: May 31, 2005
    Publication date: November 30, 2006
    Inventors: Vivek Subramanian, Pravin Shah
  • Patent number: 7129538
    Abstract: There is provided a monolithic three dimensional array of charge storage devices which includes a plurality of device levels, wherein at least one surface between two successive device levels is planarized by chemical mechanical polishing.
    Type: Grant
    Filed: May 10, 2004
    Date of Patent: October 31, 2006
    Assignee: Sandisk 3D LLC
    Inventors: Thomas H. Lee, Vivek Subramanian, James M. Cleeves, Andrew J. Walker, Christopher Petti, Igor G. Kouznetzov, Mark G. Johnson, Paul M. Farmwald, Brad Herner