Patents by Inventor Seema Agarwal

Seema Agarwal 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: 20220282403
    Abstract: The present invention relates to a method of preparing poly(acrylonitrile) fibers comprising: (i) providing a solution of poly(acrylonitrile) and a polyazide compound; and (ii) electrospinning the solution of poly(acrylonitrile) and a polyazide compound to provide fibers. The poly(acrylonitrile) fibers which are obtainable by the method are also claimed.
    Type: Application
    Filed: August 19, 2020
    Publication date: September 8, 2022
    Applicant: Universität Bayreuth
    Inventors: Andreas GREINER, Seema AGARWAL, Xiaojian LIAO
  • Patent number: 11423022
    Abstract: Techniques are described herein for building a framework for declarative query compilation using both rule-based and cost-based approaches for database management. The framework involves constructing and using: a set of rule-based properties tables that contain optimization parameters for both logical and physical optimization, a recursive algorithm to form candidate physical query plans that is based on the rule based tables, and a cost model for estimating the cost of a generated physical query plan that is used with the rule based properties tables to prune inferior query plans.
    Type: Grant
    Filed: June 25, 2018
    Date of Patent: August 23, 2022
    Assignee: Oracle International Corporation
    Inventors: Jian Wen, Sam Idicula, Nitin Kunal, Farhan Tauheed, Seema Sundara, Nipun Agarwal, Indu Bhagat
  • Patent number: 11379456
    Abstract: Systems and methods for adjusting parameters for a spin-lock implementation of concurrency control are described herein. In an embodiment, a system continuously retrieves, from a resource management system, one or more state values defining a state of the resource management system. Based on the one or more state values, the system determines that the resource management system has reached a steady state and, in response adjusts a plurality of parameters for spin-locking performed by said resource management system to identify optimal values for the plurality of parameters. After adjusting the plurality of parameters, the system detects, based on one or more current state values, a workload change in the resource management system and, in response, readjusts the plurality of parameters for spin-locking performed by said resource management system to identify new optimal values for the parameters.
    Type: Grant
    Filed: October 1, 2020
    Date of Patent: July 5, 2022
    Assignee: ORACLE INTERNATIONAL CORPORATION
    Inventors: Onur Kocberber, Mayur Bency, Marc Jolles, Seema Sundara, Nipun Agarwal
  • Publication number: 20200270388
    Abstract: The invention relates to medical aids, in particular compression products, such as compression stockings or bandages. More specifically, the invention relates to compression products comprising fibre forming polyurethane polymers showing a delayed continuous relaxation behaviour. The invention furthermore relates to polyurethane polymers containing N-diol and corresponding quaternised polyurethane polymers, to a process of producing the polyurethane polymers, to blends with elastane, as well as to uses.
    Type: Application
    Filed: August 8, 2018
    Publication date: August 27, 2020
    Inventors: CHRISTA HUGER, ANGELIKA SCHERM, SEEMA AGARWAL, ANDREAS GREINER, PIN HU
  • Patent number: 10428184
    Abstract: The invention concerns a method for producing a superhydrophobic membrane or surface coating of a substrate from an aqueous phase comprising the following steps: a) Preparing an aqueous dispersion by dispersing particles of hydrophobic polymer(s) in an aqueous solution of protic polymer(s), wherein the protic polymer(s) and the hydrophobic polymer(s) are present in a weight ratio of protic polymer(s):hydrophobic polymer(s) in a range of 5:95 to 22:78, b) electrospinning the dispersion of step a) onto a carrier for producing the membrane or onto the surface for producing the surface coating thereby producing at least one fiber and a nonwoven fabric from the fiber, c) subjecting the nonwoven fabric to a sol-gel process, wherein a precursor/precursors of the sol-gel comprise(s) an alkoxysilane, and d) curing the nonwoven fabric obtained by step c) at a temperature in a range of 50° C. to 150° C.
    Type: Grant
    Filed: April 9, 2015
    Date of Patent: October 1, 2019
    Assignee: Universitaet Bayreuth
    Inventors: Andreas Greiner, Seema Agarwal, Mitsunobu Doimoto
  • Publication number: 20190276961
    Abstract: The invention concerns an electrically conductive non-woven fabric which fabric comprises or consists of a three-dimensional network of non-woven non-electrically conductive synthetic nanofibers and electrically conductive metal nanowires distributed therein, wherein the synthetic nanofibers comprise or consist of fibers having a diameter in the range of 10 nm to 2000 nm and a maximal length of 6 mm, wherein the electrically conductive metal nanowires comprise or consist of strands having a diameter in the range of 10 nm to 800 nm and a length in the range of 1 ?m to 500 ?m, wherein the electrically conductive metal nanowires occupy between 0.5% by volume to 5% by volume of said fabric, wherein the electrically conductive metal nanowires and the synthetic nanofibers are homogenously distributed within the electrically conductive non-woven fabric.
    Type: Application
    Filed: October 27, 2017
    Publication date: September 12, 2019
    Applicant: Universität Bayreuth
    Inventors: Andreas Greiner, Seema Agarwal, Markus Langner, Steffen Reich
  • Publication number: 20180171093
    Abstract: The present invention relates to a method for preparing a metallized open-cell foam or fibrous substrate, wherein the method comprises: (A) providing an open-cell foam or fibrous substrate, wherein the open-cell foam or fibrous substrate contains a polymer comprising heteroatom-containing moieties within the bulk of the open-cell foam or fibrous substrate or as a coating on the open-cell foam or fibrous substrate, wherein the polymer comprising heteroatom-containing moieties is selected from polyvinylpyridine, polyvinylpyrrolidone, polyvinyl alcohol, polyallylamine, polyethylene oxide, polyethylene imine, polyethylene sulfide and copolymers or blends thereof; (B) contacting the open-cell foam or fibrous substrate with nanoparticles of a first metal to provide a nanoparticle coated open-cell foam or fibrous substrate; and (C) contacting the nanoparticle coated open-cell foam or fibrous substrate with a solution comprising a salt of a second metal and a reducing agent to provide the metallized open-cell foam or
    Type: Application
    Filed: February 25, 2016
    Publication date: June 21, 2018
    Inventors: Andreas Greiner, Seema Agarwal, Markus Langner
  • Publication number: 20180030623
    Abstract: The invention concerns a powder of fragments of at least one polymeric nanofiber which fragments have a maximal average length of 0.12 mm.
    Type: Application
    Filed: January 21, 2016
    Publication date: February 1, 2018
    Applicant: UNIVERSITAET BAYREUTH
    Inventors: Andreas GREINER, Seema AGARWAL, Markus LANGNER
  • Publication number: 20170022330
    Abstract: The invention concerns a method for producing a superhydrophobic membrane or surface coating of a substrate from an aqueous phase comprising the following steps: a) Preparing an aqueous dispersion by dispersing particles of hydrophobic polymer(s) in an aqueous solution of protic polymer(s), wherein the protic polymer(s) and the hydrophobic polymer(s) are present in a weight ratio of protic polymer(s):hydrophobic polymer(s) in a range of 5:95 to 22:78, b) electrospinning the dispersion of step a) onto a carrier for producing the membrane or onto the surface for producing the surface coating thereby producing at least one fiber and a nonwoven fabric from the fiber, c) subjecting the nonwoven fabric to a sol-gel process, wherein a precursor/precursors of the sol-gel comprise(s) an alkoxysilane, and d) curing the nonwoven fabric obtained by step c) at a temperature in a range of 50° C. to 150° C.
    Type: Application
    Filed: April 9, 2015
    Publication date: January 26, 2017
    Inventors: Andreas GREINER, Seema AGARWAL, Mitsonobu DOIMOTO
  • Patent number: 9068065
    Abstract: The invention at hand provides hydrolytically degradable ionic copolymers. These ionic copolymerizates are composed of one cyclic ketene acetal A, one anionic or cationic methacrylic acid derivative B, selected from 2-methyl-methacrylate, [2-(2-methyl-1-methylene-allyloxy)]ethanesulfonate, [2-(2-methyl-1-methylene-allyloxy)ethyl]phosphonate or a quaternary amine of the N,N-dimethylaminoethylmethacrylic acid (DMAEMA) and, optionally, a neutral methacrylic acid derivative C. The hydrolytically degradable anionic copolymers according to the present invention are produced by polymerizing the components A, B and C in the presence of a radical initiator under inert gas atmosphere and subsequent purification. All copolymers according to the present invention are hydrolytically degradable. Copolymers comprising a maximum of 40 mol-% of ester groups in the backbone are additionally biodegradable, wherein in the case of cationic copolymers a maximum of 20 mol-% of quaternized DMAEMA is allowed to be available.
    Type: Grant
    Filed: April 9, 2009
    Date of Patent: June 30, 2015
    Assignee: BASF SE
    Inventors: Andreas Greiner, Seema Agarwal, Thomas Kissel, Liqun Ren
  • Patent number: 8871881
    Abstract: The invention at hand concerns hydrophobic polymer surfaces, in particular superhydrophobic polymer surfaces, comprising at least one homo- or copolymer, which comprises at least one side chain with at least one fluoro-substituted aryl group. Furthermore, the invention at hand concerns a method for the production of polymer surfaces of this type, their use and polymers of the general formula I: wherein n is an integer between 10 and 4,500, preferably between 20 and 2,200 and particularly preferably between 100 and 670.
    Type: Grant
    Filed: February 23, 2006
    Date of Patent: October 28, 2014
    Assignee: Philipps-Universität Marburg
    Inventors: Andreas Greiner, Seema Agarwal, Michael Bognitzki, Sven Horst
  • Publication number: 20130214441
    Abstract: The present invention provides aqueous stable suspensions of biodegradable diblock copolyesters and a method for their production. The diblock copolyesters comprise one block of an aliphatic polyester and one block of a polyethylene oxide. Suspensions according to the present invention are suitable to be used as biodegradable viscosity modifiers, compatibilizers in blends, as glues, varnishes, paper additives, flame retardants, impact modifiers and hazers of transparent plastics, and for the production of biodegradable sheets, films, fibers, plates, vessels, tubes and capillaries for transport or packaging purposes. Furthermore, the suspensions according to the present invention are suitable to be used for the production of nano- and microfibers and nano- and microfiber nonwovens with non-oriented or oriented fibers by means of electrospinning.
    Type: Application
    Filed: August 12, 2011
    Publication date: August 22, 2013
    Applicant: PHILLIPS-UNIVERSITÄT MARBURG
    Inventors: Andreas Greiner, Seema Agarwal, Kathrin Bubel
  • Publication number: 20120302703
    Abstract: The present invention provides a method to produce metal-containing nanoparticles enveloped with polymers, as well as particles obtainable therefrom. In the method according to the present invention, at least one anionic polymerizable monomer is polymerized in the presence of an anionic macroinitiator at room temperature. Subsequently, an aliphatic or aromatic sulfide is firstly added, followed by a solution of at least one organosoluble metal salt in an aprotic organic solvent and finally a homogeneous reducing agent. The metal cation is hereby reduced to the metal. Metal-containing nanoparticles are formed which are covalently bonded to the growing anionic polymerizates. The metal salts are preferably salts of silver, copper, gold, tin, lead, chrome or zinc, or mixtures thereof.
    Type: Application
    Filed: February 1, 2010
    Publication date: November 29, 2012
    Applicant: Philipps-Universitaet Marburg
    Inventors: Andreas Greiner, Seema Agarwal, Julia Schmidt, Stefan Bokern
  • Publication number: 20120259064
    Abstract: The invention provides new polymeric or oligomeric active agents with a biocidal effect. Such particularly advantageous polymeric or oligomeric active agents with a biocidal effect are obtainable via polycondensation of a guanidine acid addition salt with an amine mixture comprising at least one diamine and/or one triamine, wherein at least one amine is selected from the group comprising i) diamine, comprising at least one cycloaliphatic residue, and ii) dialkylenetriamine. At least one amine is hereby preferably selected from 4,4?-methylenebis(cyclohexylamine) and diethylenetriamine. Furthermore, it is favorable if the guanidine acid addition salt is guanidinehydrochloride.
    Type: Application
    Filed: November 12, 2010
    Publication date: October 11, 2012
    Inventors: Andreas Greiner, Seema Agarwal, Claudia Mattheis
  • Publication number: 20120107900
    Abstract: The present invention provides electrospun polymer fibers comprising bacteria-containing hydrogel particles. Bacteria-containing hydrogel particles are produced by crosslinking water-soluble polymers to form hydrogels and mixing them with a bacteria suspension. The crosslinking is suitable to be carried out either chemically before the addition of the bacteria suspension or physically before or after this addition. Subsequently, these hydrogel particles are electrospun together with an electrospinnable polymer solution to form fibers or fibre non-wovens. The bacteria which are located in these hydrogel particles or in the electrospun polymer fibers comprising these particles, respectively, are capable of surviving for a long period (several months) without the supply of water or cell-culture media and are simultaneously protected against the effect of solvents, for example alcohols, acetone, chlorinated hydrocarbons, ethers and toluene, which would otherwise kill said bacteria.
    Type: Application
    Filed: December 18, 2009
    Publication date: May 3, 2012
    Applicant: Philipps-Universitat Marburg
    Inventors: Andreas Greiner, Seema Agarwal, Marco Gensheimer
  • Publication number: 20110160426
    Abstract: The invention at hand provides hydrolytically degradable ionic copolymers. These ionic copolymerizates are composed of one cyclic ketene acetal A, one anionic or cationic methacrylic acid derivative B, selected from 2-methyl-methacrylate, [2-(2-methyl-1-methylene-allyloxy)]ethanesulfonate, [2-(2-methyl-1-methylene-allyloxy)ethyl]phosphonate or a quaternary amine of the N,N-dimethylaminoethylmethacrylic acid (DMAEMA) and, optionally, a neutral methacrylic acid derivative C. The hydrolytically degradable anionic copolymers according to the present invention are produced by polymerizing the components A, B and C in the presence of a radical initiator under inert gas atmosphere and subsequent purification. All copolymers according to the present invention are hydrolytically degradable. Copolymers comprising a maximum of 40 mol-% of ester groups in the backbone are additionally biodegradable, wherein in the case of cationic copolymers a maximum of 20 mol-% of quaternized DMAEMA is allowed to be available.
    Type: Application
    Filed: April 9, 2009
    Publication date: June 30, 2011
    Applicant: PHILIPPS-UNIVERSITAT MARBURG
    Inventors: Andreas Greiner, Seema Agarwal, Thomas Kissel, Liqun Ren
  • Publication number: 20090010870
    Abstract: The invention at hand concerns hydrophobic polymer surfaces, in particular superhydrophobic polymer surfaces, comprising at least one homo- or copolymer, which comprises at least one side chain with at least one fluoro-substituted aryl group. Furthermore, the invention at hand concerns a method for the production of polymer surfaces of this type, their use and polymers of the general formula I: wherein n is an integer between 10 and 4,500, preferably between 20 and 2,200 and particularly preferably between 100 and 670.
    Type: Application
    Filed: February 23, 2006
    Publication date: January 8, 2009
    Inventors: Andreas Greiner, Seema Agarwal, Michael Bognitzki, Sven Horst