Patents by Inventor Duryodhan Mangaraj

Duryodhan Mangaraj 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: 6797790
    Abstract: The polymeric composition for friction elements comprises a co-polymer between (I) a resin containing phenolic groups and a reticulation agent, and (II) an organopolysiloxane resin containing terminal silanol groups. A part at least of the phenolic groups is bound to the terminal silanol groups. A process of the preparation of the above polymeric composition may comprise the following steps: a) mixing (I) a resin containing the phenolic groups and the reticulation agent, (II) containing the terminal silanol groups, and (III) an epoxy resin or the epoxidisesd organopolysiloxane; b) curing the mixture for a period of time sufficient to complete substantially the reaction between the phenolic groups and the terminal silanol groups, c) post-heating the product obtained under b).
    Type: Grant
    Filed: April 23, 2002
    Date of Patent: September 28, 2004
    Assignee: Nisshinbo Industries, Inc.
    Inventors: Vasilios Kanellopoulos, Isabelle Louis-Joseph-Dogue, Vincent Daniel McGinniss, Duryodhan Mangaraj, Tomoki Tsuchiy Nakamura
  • Patent number: 6777461
    Abstract: The polymeric composition for friction elements comprises a co-polymer between (I) a resin containing phenolic groups and a reticulation agent, and (II) an organopolysiloxane resin containing terminal silanol groups. A part at least of the phenolic groups is bound to the terminal silanol groups. A process of the preparation of the above polymeric composition may comprise the following steps: a) mixing (I) a resin containing the phenolic groups and the reticulation agent, (II) resin containing the terminal silanol groups, and (III) an epoxy resin or the epoxidisesd organopolysiloxane; b) curing the mixture for a period of time sufficient to complete substantially the reaction between the phenolic groups and the terminal silanol groups, c) post-heating the product obtained under b).
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: August 17, 2004
    Assignee: Nisshinbo Industries, Inc.
    Inventors: Vasilios Kanellopoulos, Isabelle Louis-Joseph-Dogue, Vincent Daniel McGinniss, Duryodhan Mangaraj, Tomoki Tsuchiya Nakamura
  • Patent number: 6749709
    Abstract: A thermoplastic composite lumber product having at least one layer of a reinforcing laminate containing unidirectional fibers of glass, carbon or ceramics. The thermoplastic composite lumber of the present invention exhibits superior stiffness and strength compared to typical, non-reinforced plastic lumber.
    Type: Grant
    Filed: April 25, 2002
    Date of Patent: June 15, 2004
    Assignee: Engineering Mechanics Corporation of Columbus
    Inventors: Prabhat Krishnawswamy, Duryodhan Mangaraj
  • Patent number: 6402832
    Abstract: The present invention is an improved wallboard joint compound comprising an inorganic joint compound such as, for example, gypsum, mixed with water, plus one or more additives selected to reduce the moisture in the gypsum compound and improve the strength of the finished wallboard joint. The first additive is selected from a class of water soluble functional polymer with either nitrogen or sulfonate, such as, for example, polyvinyl pyrrolidone (PVP). A second additive is selected from a class of solid epoxy resins, preferably added together with the first additive. These two additives, when mixed with the joint compound alone or in combination, produced a more flexible, higher strength wallboard with a reduce moisture content and quicker drying time.
    Type: Grant
    Filed: May 15, 2000
    Date of Patent: June 11, 2002
    Assignee: Fleetwood Enterprise, Inc. a Delaware Corporation
    Inventors: Bhima R. Vijayendran, Gregory R. White, Rachel M. Thurston, Duryodhan Mangaraj
  • Patent number: 6391456
    Abstract: A thermoplastic composite lumber product having at least one layer of a reinforcing laminate containing unidirectional fibers of glass, carbon or ceramics. The thermoplastic composite lumber of the present invention exhibits superior stiffness and strength compared to typical, non-reinforced plastic lumber.
    Type: Grant
    Filed: August 8, 2000
    Date of Patent: May 21, 2002
    Assignee: Engineering Mechanics Corporation of Columbus
    Inventors: Prabhat Krishnaswamy, Duryodhan Mangaraj
  • Patent number: 5128424
    Abstract: Broadly, the present invention is directed to an adhesive composition which comprises an epoxy resin, an effective amount of a mercapto curing agent or curative for said epoxy resin, and a compatibilizing amount of a polysulfide compound which has a performance improving fraction of its --SH groups rendered unreactive with the epoxy groups in said composition. Optionally, the adhesive composition can contain amine or amide curing agents in addition to the mercapto curative. Advantageously, at least about 5% of the number of reactive thiol groups of the polysulfide compound are rendered unreactive, advantageously at least about 25%, and preferably at least about 50%. Preferred polysulfide compatibilizing compounds are adducts of a polysulfide and a component which contains functionality reactive with a thiol group, but which contains no residual functionality reactive with epoxy groups in the composition once the polysulfide adduct is formed.
    Type: Grant
    Filed: July 18, 1991
    Date of Patent: July 7, 1992
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Vincent D. McGinnis, Kazumi Nejigaki, Duryodhan Mangaraj
  • Patent number: 4548771
    Abstract: Methods and apparatus for vulcanizing rubber and like material (10). Ultrasonic energy at about 10 to 100 kilohertz is applied to the material (10) at an energy intensity sufficient to generate heat to a temperature in the range of about 200 to 300 degrees Fahrenheit, while a static pressure is applied on the material (10) sufficient to prevent substantial cavitation and material degradation. The application of the ultrasonic energy and the pressure is maintained for at least about 10 minutes for each 1/8 inch in thickness of the material (10).
    Type: Grant
    Filed: January 30, 1984
    Date of Patent: October 22, 1985
    Assignee: Battelle Memorial Institute
    Inventors: Nagabhusan Senapati, Duryodhan Mangaraj
  • Patent number: 4105811
    Abstract: A method is disclosed for protecting aluminum and aluminum alloys by the chemical bonding of a polymerized coating to the aluminum oxide on the aluminum surface. The protective coating is graft polymerized from a solution onto the aluminum in the presence of a small amount of silver ion as an initiator. A peroxide is present during the graft polymerization to regenerate silver ions and to catalyze polymerization of monomers and prepolymers which attach to the aluminum surface. The monomers are vinyl monomers containing one or more hydroxy, carboxy, glycidyl and aziridinyl groups. The prepolymers are polyurethane resins and aliphatic, cycloaliphatic and aromatic epoxy resins. The vinyl monomers and prepolymers are cross-linked to provide a transparent, impervious protective coating on the aluminum. The coated aluminum article made by the above method is also disclosed.
    Type: Grant
    Filed: February 7, 1975
    Date of Patent: August 8, 1978
    Assignee: PolyGulf Associates
    Inventors: Carl Horowitz, Michael Dichter, Duryodhan Mangaraj
  • Patent number: 4006749
    Abstract: This invention provides a process for so treating tobacco, for use in cigars or cigarettes, as to activate the surface of the tobacco to remove the undesirable components of the smoke as the smoke passes along the cigar or cigarette, before reaching the smoker. The process provides for grafting onto the cellulosic constituents of the tobacco a graft polymer or copolymer having free functional groups reactive with the undesirable component of the tobacco smoke. The cellulosic constituents can be activated by an ionic or free radical process to yield a reactive site on the cellulosic chain which can subsequently be reacted with monomers containing active double bonds, e.g., olefins, vinyl monomers or acrylic monomers as well as polymerizable ring compounds each having the desired active substituents. Preferably, this invention is applicable to treating tobacco so as to provide a graft polymer or copolymer containing acidic groups which can react with the basic, or alkaline, components of tobacco smoke.
    Type: Grant
    Filed: January 31, 1975
    Date of Patent: February 8, 1977
    Assignee: Consolidated Cigar Corporation
    Inventors: Carl Horowitz, Michael Dichter, Nathan Abrams, Duryodhan Mangaraj
  • Patent number: 3998602
    Abstract: Methods are disclosed for the metallizing of non-metallic substrates, i.e. polymeric substrates, by the coating of the substrate with polymerizable monomers in the presence of a small amount of silver ion. The substrate is cleaned, acid etched and then contacted with a monomer solution containing a soluble silver salt. The monomers are preferably polyfunctional and form a polymerized layer grafted onto the polymer substrate. A peroxide is also disclosed in the monomer solution for regeneration of the silver ion concentration and to combine with monomers to produce homopolymers which also attach to the active sites on the substrate and to side chains of the graft polymer. The grafted layer contains silver atoms closely bound to it and the silver atoms form nucleating agents for the deposition of copper from an electroless plating bath. The metallized substrate may then be further electroplated.
    Type: Grant
    Filed: February 7, 1975
    Date of Patent: December 21, 1976
    Inventors: Carl Horowitz, Michael Dichter, Duryodhan Mangaraj