Patents by Inventor Vijayendra Kumar
Vijayendra Kumar 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).
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Publication number: 20070161522Abstract: Compositions comprise first antioxidants and first additives, such as, a surface additives, performance enhancing additives and lubricant protective additives and optionally second additives and/or second antioxidants. The compositions are useful to improve lubricants, lubricant oils and other lubricant materials. The compositions and methods generally provide longer shelf lives, increased oxidative resistance, improved quality and/or enhanced performance to lubricants or lubricant oils.Type: ApplicationFiled: November 30, 2006Publication date: July 12, 2007Inventors: Ashok Cholli, Ashish Dhawan, Rajesh Kumar, Vijayendra Kumar, Suizhou Yang, Taizoon Canteenwala
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Publication number: 20070154720Abstract: Antioxidant polymers of the present invention comprise repeat units that include one or both of Structural Formulas (I) and (II): wherein: R is —H or a substituted or unsubstituted alkyl, acyl or aryl group; Ring A is substituted with at least one tert-butyl group or substituted or unsubstituted n-alkoxycarbonyl group; Ring B is substituted with at least one —H and at least one tert-butyl group or substituted or unsubstituted n-alkoxycarbonyl group; Rings A and B are each optionally substituted with one or more groups selected from the group consisting of —OH, —NH, —SH, a substituted or unsubstituted alkyl or aryl group, and a substituted or unsubstituted alkoxycarbonyl group; n is an integer equal to or greater than 2; and p is an integer equal to or greater than 0. The invention also includes methods of using and preparing these polymers.Type: ApplicationFiled: February 27, 2007Publication date: July 5, 2007Inventors: Ashok Cholli, Vijayendra Kumar, Jayant Kumar, Virinder Parmar, Lynne Samuelson, Ferdinando Bruno
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Publication number: 20070154608Abstract: Antioxidant polymers of the present invention comprise repeat units that include one or both of Structural Formulas (I) and (II): wherein: R is —H or a substituted or unsubstituted alkyl, acyl or aryl group; Ring A is substituted with at least one tert-butyl group or substituted or unsubstituted n-alkoxycarbonyl group; Ring B is substituted with at least one —H and at least one tert-butyl group or substituted or unsubstituted n-alkoxycarbonyl group; Rings A and B are each optionally substituted with one or more groups selected from the group consisting of —OH, —NH, —SH, a substituted or unsubstituted alkyl or aryl group, and a substituted or unsubstituted alkoxycarbonyl group; n is an integer equal to or greater than 2; and p is an integer equal to or greater than 0. The invention also includes methods of using and preparing these polymers.Type: ApplicationFiled: February 27, 2007Publication date: July 5, 2007Inventors: Ashok Cholli, Vijayendra Kumar, Javant Kumar, Virinder Parmar, Lynne Samuelson, Ferdinando Bruno
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Publication number: 20070154430Abstract: Antioxidant polymers of the present invention comprise repeat units that include one or both of Structural Formulas (I) and (II): wherein: R is —H or a substituted or unsubstituted alkyl, acyl or aryl group; Ring A is substituted with at least one tert-butyl group or substituted or unsubstituted n-alkoxycarbonyl group; Ring B is substituted with at least one —H and at least one tert-butyl group or substituted or unsubstituted n-alkoxycarbonyl group; Rings A and B are each optionally substituted with one or more groups selected from the group consisting of —OH, —NH, —SH, a substituted or unsubstituted alkyl or aryl group, and a substituted or unsubstituted alkoxycarbonyl group; n is an integer equal to or greater than 2; and p is an integer equal to or greater than 0. The invention also includes methods of using and preparing these polymers.Type: ApplicationFiled: February 27, 2007Publication date: July 5, 2007Inventors: Ashok Cholli, Vijayendra Kumar, Javant Kumar, Virinder Parmar, Lynne Samuelson, Ferdinando Bruno
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Publication number: 20070149660Abstract: Disclosed are compositions comprising antioxidants and stabilizers, such as, acid scavengers or organic phosphorus stabilizers, and optionally further comprising co-stabilizers. The disclosed compositions are useful as stabilizers for polyolefins and other polymeric materials. The disclosed compositions and methods generally provide longer shelf lifes and better oxidative resistance to materials than currently available antioxidants.Type: ApplicationFiled: October 27, 2006Publication date: June 28, 2007Inventors: Vijayendra Kumar, Rajesh Kumar, Ashish Dhawan, Suizhou Yang, Ashok Cholli
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Patent number: 7223432Abstract: Antioxidant polymers of the present invention comprise repeat units that include one or both of Structural Formulas (I) and (II): wherein: R is —H or a substituted or unsubstituted alkyl, acyl or aryl group; Ring A is substituted with at least one tert-butyl group or substituted or unsubstituted n-alkoxycarbonyl group; Ring B is substituted with at least one —H and at least one tert-butyl group or substituted or unsubstituted n-alkoxycarbonyl group; Rings A and B are each optionally substituted with one or more groups selected from the group consisting of —OH, —NH, —SH, a substituted or unsubstituted alkyl or aryl group, and a substituted or unsubstituted alkoxycarbonyl group; n is an integer equal to or greater than 2; and p is an integer equal to or greater than 0. The invention also includes methods of using and preparing these polymers.Type: GrantFiled: April 4, 2003Date of Patent: May 29, 2007Assignees: University of Massachusettes Lowell, United States of America, as represented by the Secretary of the ArmyInventors: Ashok L. Cholli, Vijayendra Kumar, Jayant Kumar, Virinder Singh Parmar, Lynne Ann Samuelson, Ferdinando F. Bruno
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Publication number: 20070106059Abstract: Disclosed are macromolecular antioxidants represented by a structural formula selected from I-VI: and polymeric macromolecular antioxidants comprises at least one repeating unit represented by a structural formula selected from VIIa, VIIb, VIIIa, VIIIb or a combination thereof: possessing superior oxidative resistance and higher thermal stability than commercially available antioxidants, and synthesis and applications of these macromolecular antioxidants and polymeric macromolecular antioxidants.Type: ApplicationFiled: October 27, 2006Publication date: May 10, 2007Inventors: Ashok Cholli, Rajesh Kumar, Ashish Dhawan, Suizhou Yang, Vijayendra Kumar
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Publication number: 20060189824Abstract: Disclosed are compounds represented by structural formula (I): methods of producing compounds represented by structural formula (I) and their use in inhibiting oxidation in an oxidizable material.Type: ApplicationFiled: February 22, 2006Publication date: August 24, 2006Inventors: Rajesh Kumar, Suizhou Yang, Vijayendra Kumar, Ashok Cholli
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Publication number: 20060128939Abstract: Disclosed is a method for the synthesis of sterically hindered polymeric antioxidants based on phenol type antioxidant monomers. The method includes mono-deacetylating, polymerizing and deacetylating an aryl monomer represented by the following structural formula: to produce a sterically hindered polymeric macromolecular antioxidant. X, R10 and q are as defined herein. The disclosed method is a simple, direct and economical process for the synthesis of sterically hindered polymeric macromolecular antioxidants.Type: ApplicationFiled: December 2, 2005Publication date: June 15, 2006Inventors: Vijayendra Kumar, Suizhou Yang, Ashok Cholli
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Publication number: 20060029706Abstract: Antioxidant polymers of the present invention comprise repeat units that include one or both of Structural Formulas (I) and (II): wherein: R is —H or a substituted or unsubstituted alkyl, acyl or aryl group; Ring A is substituted with at least one tert-butyl group or substituted or unsubstituted n-alkoxycarbonyl group; Ring B is substituted with at least one —H and at least one tert-butyl group or substituted or unsubstituted n-alkoxycarbonyl group; Rings A and B are each optionally substituted with one or more groups selected from the group consisting of —OH, —NH, —SH, a substituted or unsubstituted alkyl or aryl group, and a substituted or unsubstituted alkoxycarbonyl group; n is an integer equal to or greater than 2; and p is an integer equal to or greater than 0. The invention also includes methods of using and preparing these polymers.Type: ApplicationFiled: September 26, 2005Publication date: February 9, 2006Inventors: Ashok Cholli, Vijayendra Kumar, Javant Kumar, Virinder Parmar, Lynne Samuelson, Ferdinando Bruno
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Publication number: 20050238789Abstract: A method of preparing an antioxidant polymer includes forming or obtaining a first polymer having reactive pendant groups, where the first polymer does not include cyclic anhydride repeat units, and derivatizing the first polymer with an antioxidant. Another method of preparing an antioxidant polymer includes forming or obtaining a first polymer having reactive pendant groups and derivatizing the first polymer with an antioxidant, where the antioxidant is attached to the first polymer by an acetal, amide, amine, carbamate, carbonate, ester, ether or thioether linkage or by a carbon-carbon bond. The invention is also directed to polymers that are generally prepared by these methods, compositions that include such polymers and methods of using such polymers.Type: ApplicationFiled: January 21, 2005Publication date: October 27, 2005Applicant: University of Massachusetts LowellInventors: Ashok Cholli, Ashish Dhawan, Vijayendra Kumar
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Publication number: 20040214935Abstract: One group of polymers comprise repeat units of Structural Formula (I) and/or (II): 1Type: ApplicationFiled: January 21, 2004Publication date: October 28, 2004Applicants: University of Massachusetts Lowell, Government of the United States, as represented by the Secretary of the ArmyInventors: Ashok L. Cholli, Vijayendra Kumar, Ashish Dhawan, Jayant Kumar, Virinder Singh Parmar, Lynne Ann Samuelson, Ferdinando F. Bruno
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Publication number: 20030230743Abstract: Antioxidant polymers of the present invention comprise repeat units that include one or both of Structural Formulas (I) and (II): 1Type: ApplicationFiled: April 4, 2003Publication date: December 18, 2003Applicant: University of Massachusetts LowellInventors: Ashok L. Cholli, Vijayendra Kumar, Jayant Kumar, Virinder Singh Parmar, Lynne Ann Samuelson, Ferdinando F. Bruno
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Patent number: 6032410Abstract: A sod comprising a root support matrix that itself comprises a mixture of soil and/or sand, and shredded carpet fragments, wherein the shredded carpet fragments are from about one-tenth percent (0.1%) to about five percent (5.0%) by weight of the matrix; and a plurality of plants growing in said root support matrix, said plants having roots entangled with said shredded carpet fragments. The shredded carpet fragments comprise a mass of entangled face yarns some of which yarns have bits of carpet backing material attached thereto, wherein at least about ninety percent (90%), and more preferably at least about ninety-five percent (95%), of the bits of carpet backing material have no one dimension greater than about one-quarter (0.25) inch.Type: GrantFiled: January 28, 1997Date of Patent: March 7, 2000Assignee: E. I. du Pont de Nemours and CompanyInventor: Vijayendra Kumar
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Patent number: 6022827Abstract: A sod comprising a root support matrix that itself comprises a mixture of soil and/or sand and shredded carpet pieces has a beneficial plant adjuvant disposed on the shredded fabric pieces, preferably in the form of shredded carpet pieces. The beneficial plant adjuvant is initially suspended in an aqueous solution of water and a degradable, slow-release, water-soluble liquid polymer that when dried forms a coating on the surface of the shredded carpet pieces.Type: GrantFiled: January 28, 1997Date of Patent: February 8, 2000Assignee: E. I. du Pont de Nemours and CompanyInventors: Vijayendra Kumar, Darryl Alan Meade
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Patent number: 5906877Abstract: This invention provides moisture stable tuftstring carpet assemblies. The pile surface structure comprises a moisture stable backing substrate, a plurality of elongated pile articles each comprising an elongated, moisture stable support strand having bonded thereto a plurality of "U" shaped bundles of multifilament yarn. The pile articles are bonded to the backing substrate. Different backing substrates and support strands may be used.Type: GrantFiled: March 5, 1996Date of Patent: May 25, 1999Assignee: E. I. du Pont de Nemours & Co.Inventors: Peter Popper, Rashi Akki, Lap-Tak Andrew Cheng, Carmen Anoish Covelli, Sassan Hojabr, George Kevork Kodokian, Vijayendra Kumar, James K. Odle, Kalika Ranjan Samant, Caroline Tjhen Shibata, Wae-Hai Tung, Gregory Paul Weeks, Paul Wesley Yngve
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Patent number: 5470648Abstract: This invention relates to composite fabrics having two layers of nonwoven fabric comprising entangled non-bonded nylon filaments and a reinforcing layer of fiberglass scrim adhesively attached to each of the nonwoven layers. The composite fabrics are useful as backings in a carpet assembly.Type: GrantFiled: June 10, 1994Date of Patent: November 28, 1995Assignee: E. I. Du Pont de Nemours and CompanyInventors: Paul S. Pearlman, Vijayendra Kumar
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Patent number: 5404671Abstract: A novel multi-layer sod and the method for making said sod is disclosed. The sod contains recycled waste products including pieces of carpet and compost.Type: GrantFiled: October 27, 1993Date of Patent: April 11, 1995Assignee: E. I. Du Pont de Nemours and CompanyInventors: William H. Farrow, Jr., Vijayendra Kumar, William H. Mitchell
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Patent number: 4906520Abstract: A fabric, useful as a primary carpet backing, woven in both the warp and weft directions from filmy elements in the form of longitudinally-oriented, splittable ribbons formed from a blend of a major amount of polyester and a minor amount of a polyolefin. The ribbons split longitudinally when punctured by a tufting needle, thus providing for a more secure grip on the tufted carpet yarn than that given by conventional polyester backings. The use of polyester as a principal component overcomes certain drawbacks of polypropylene backings. Alternative processes for making these fabrics, each involving a heat-treating step at a temperature of at least 150.degree. F. (66.degree. C.) for a sufficient period of time to render the ribbons splittable, are also disclosed.Type: GrantFiled: May 2, 1988Date of Patent: March 6, 1990Assignee: E. I. Du Pont de Nemours and CompanyInventor: Vijayendra Kumar
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Patent number: H90Abstract: A stitch-bonded fabric having two split-film layers as a weft component and one split-film layer as a warp component held together by a stitching yarn is improved significantly in its performance as a primary backing for a tufted pile carpet by having a nonwoven sheet of continuous organic filaments attached to the warp component. In tufting, the nonwoven sheet becomes the back side of the backing.Type: GrantFiled: August 23, 1985Date of Patent: July 1, 1986Inventor: Vijayendra Kumar