Patents by Inventor Sundar Mohan Rao

Sundar Mohan Rao 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: 20230302761
    Abstract: A composition may comprise a fabric substrate having a first melting temperature and a polymer sheet having a second melting temperature, wherein the second melting temperature may be less than the first melting temperature. The polymer sheet and the fabric substrate may have a base thermoplastic polymer in common. The polymer sheet may be at least partially melted and laminated onto the fabric substrate such that the polymer sheet and fabric substrate become fused to produce a fused laminated fabric. A recycling process may be performed on the fused laminated fabric, wherein the fabric substrate and the polymer sheet remain laminated throughout the recycling process.
    Type: Application
    Filed: March 17, 2023
    Publication date: September 28, 2023
    Inventors: Laura E. Pritchard, Sundar Mohan Rao, Subhash Chand
  • Patent number: 11420428
    Abstract: A composite polymeric film wear layer for application as a surface protection layer to impart lower gloss, higher scratch resistance, wear performance and comfort under foot to hard surface substrates is provided. Hard surface substrate made with the composite as well as methods for application are also provided.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: August 23, 2022
    Assignee: Lowe's Companies, Inc.
    Inventor: Sundar Mohan Rao
  • Publication number: 20210131120
    Abstract: A hard tile product and system useful for covering floors, walls and other surfaces which are both easy to install and remove are provided.
    Type: Application
    Filed: April 17, 2018
    Publication date: May 6, 2021
    Applicant: INVISTA NORTH AMERICA S.A.R.L.
    Inventor: Sundar Mohan RAO
  • Patent number: 10683605
    Abstract: A fiber and method for making the same is disclosed that comprises a surface treatment, wherein the surface treatment comprises at least one clay nanoparticle component present in an amount greater than 2000 ppm on the surface of the fiber. Also disclosed is a fiber and method for making the same, comprising a surface treatment, wherein the surface treatment comprises at least one clay nanoparticle component and excludes flourochemicals.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: June 16, 2020
    Assignee: INVISTA North America S.a.r.l.
    Inventors: Michele A. Ivy, Kelcey N. Charles, Isaac K. Iverson, Sundar Mohan Rao
  • Publication number: 20200139686
    Abstract: A composite polymeric film wear layer for application as a surface protection layer to impart lower gloss, higher scratch resistance, wear performance and comfort under foot to hard surface substrates is provided. Hard surface substrate made with the composite as well as methods for application are also provided.
    Type: Application
    Filed: July 24, 2018
    Publication date: May 7, 2020
    Applicant: INVISTA NORTH AMERICA S.A.R.L.
    Inventor: Sundar Mohan RAO
  • Publication number: 20190055671
    Abstract: Processes for forming synthetic fibers from polymer melts containing a first fiber forming polymer, a spin assist additive, and optionally a pigment additive are provided. Also provided are synthetic fibers of a first fiber forming polymer, a spin assist additive, and optionally a pigment additive, as well as articles of manufacture such as yarns, carpets and fabrics made up of these synthetic fibers.
    Type: Application
    Filed: April 18, 2016
    Publication date: February 21, 2019
    Inventor: Sundar Mohan Rao
  • Publication number: 20180094372
    Abstract: Disclosed are spray-on anti-soil formulations, and methods for treating fibers, carpets, and fabrics with the same. The anti-soil formulations comprise a synergistic blend of an anti-soil component and a stain blocker component adapted to be sprayed-on a fiber, carpet, or fabric instead of known exhaust applications. The anti-soil component can be either fluorochemical or non-fluorochemical based, while the stain blocker can comprise any chemical that blocks positively charged dye sites. Fibers, carpets and fabrics treated with the anti-soil formulations exhibit superior anti-soil characteristics compared to sprayed-on fluorochemicals and exhibit similar anti-soil characteristics compared to known exhaust applications.
    Type: Application
    Filed: December 7, 2017
    Publication date: April 5, 2018
    Applicant: INVISTA NORTH AMERICA S.A.R.L.
    Inventor: Sundar Mohan RAO
  • Publication number: 20160298288
    Abstract: A fiber and method for making the same is disclosed that comprises a surface treatment, wherein the surface treatment comprises at least one clay nanoparticle component present in an amount greater than 2000 ppm on the surface of the fiber. Also disclosed is a fiber and method for making the same, comprising a surface treatment, wherein the surface treatment comprises at least one clay nanoparticle component and excludes flourochemicals.
    Type: Application
    Filed: November 14, 2014
    Publication date: October 13, 2016
    Applicant: INVISTA NORTH AMERICA S.A.R.L.
    Inventors: Michelle A. IVY, Kelcey K. CHARLES, Isaac K. IVERSON, Sundar Mohan RAO
  • Publication number: 20160263859
    Abstract: A composite film comprising one or more barrier film layers, wherein the one or more barrier film layers are liquid impermeable and have a total moisture vapor transfer rate (MVTR) of at least 14.6 g/24 hr/m2 according to ASTM E96B and one or more dimensionally stable layers, wherein the composite film has a robustness of greater than about 1.49 pound force.
    Type: Application
    Filed: October 14, 2014
    Publication date: September 15, 2016
    Applicant: INVISTA North America S.ar.l.
    Inventors: Sundar Mohan RAO, John Paul RYAN
  • Publication number: 20140037891
    Abstract: Disclosed are spray-on anti-soil formulations, and methods for treating fibers, carpets, and fabrics with the same. The anti-soil formulations comprise a synergistic blend of an anti-soil component and a stain blocker component adapted to be sprayed-on a fiber, carpet, or fabric instead of known exhaust applications. The anti-soil component can be either fluorochemical or non-fluorochemical based, while the stain blocker can comprise any chemical that blocks positively charged dye sites. Fibers, carpets, and fabrics treated with the anti-soil formulations exhibit superior anti-soil characteristics compared to sprayed-on fluorochemicals and exhibit similar anti-soil characteristics compared to known exhaust application.
    Type: Application
    Filed: November 9, 2011
    Publication date: February 6, 2014
    Inventor: Sundar Mohan Rao
  • Publication number: 20140033451
    Abstract: Disclosed is composition comprising an aqueous dispersion containing a dye, a stain blocker component, and an anti-soil component. The composition provides uniform dyeing, and superior stain blocking and anti-soil characteristics to fibers, carpets, and fabrics by adjusting the conductivity and pH of the dispersion. Alternatively, the composition can comprise an aqueous dispersion containing a dye, a stain blocker component, and a retarder for slowing down the rate of dye reaction. Also disclosed is a method of applying the compositions and dispersions to fibers, carpets, and fabrics.
    Type: Application
    Filed: November 9, 2011
    Publication date: February 6, 2014
    Applicant: Toray Opelontex Co., Ltd.
    Inventor: Sundar Mohan Rao
  • Publication number: 20120301659
    Abstract: Polyamide terpolymer compositions, which contain biobased monomers and are suitable for making shaped articles, are disclosed. Comprised of three monomeric species polymerized randomly, including hexamethylene diamine, adipic acid and a bio-based monomer, the compositions are easier to process and have better dye uniformity than polyamides formed from melt-blended biobased components, and are comparable in dyeability, color fastnessand appearance retention performance to non-biobased polyamide copolymers.
    Type: Application
    Filed: January 31, 2011
    Publication date: November 29, 2012
    Applicant: INVISTA North America S.a r.I.
    Inventor: Sundar Mohan Rao
  • Publication number: 20120094059
    Abstract: The present invention relates to a nylon yarn of a finely dispersed melt blended polymer alloy having i) a polyamide component selected from polyhexamethyleneadipamide, polycaprolactam and mixtures thereof, and ii) a nylon 11 component; wherein the polyamide component is the major component by weight of the total melt blended polymer and wherein the polyamide component has a viscosity of about 2.6 IV or more as measured in 96% sulfuric acid. The resulting nylon yarn shows improved bleach resistance. The present invention also relates to processes of producing the yarn and nylon carpets comprising the yarn described above.
    Type: Application
    Filed: May 11, 2010
    Publication date: April 19, 2012
    Applicant: INVISTA NORTH AMERICA S.a r.l.
    Inventors: Kevin Leonard Urman, Sundar Mohan Rao, Isaac Keene Ivedrson
  • Patent number: 7651540
    Abstract: A method of producing a multicolored textured carpet comprises blending a polyamide polymer and a color pigment to form a melt blend, extrusion spinning the melt blend to form pigmented polyamide yarns, tufting (1) the pigmented polyamide yarns and (2) white dyeable polyamide yarns into a carpet, and overdyeing the carpet with an amount of acid dye sufficient to produce the multicolored textured carpet. The color pigment and the acid dye are selected to provide desired multicolored effect in the carpet. The multicolored textured carpet having deeper color and dye light fastness is also disclosed.
    Type: Grant
    Filed: July 24, 2006
    Date of Patent: January 26, 2010
    Assignee: INVISTA Technologies S.A.R.l.
    Inventor: Sundar Mohan Rao
  • Publication number: 20090136704
    Abstract: Briefly described, embodiments of this disclosure include fibers, methods of making fibers, structures (e.g., textile articles), and carpets.
    Type: Application
    Filed: November 25, 2008
    Publication date: May 28, 2009
    Applicant: INVISTA North America S. a r. I.
    Inventor: Sundar Mohan Rao
  • Publication number: 20080016625
    Abstract: A method of producing a multicolored textured carpet comprises blending a polyamide polymer and a color pigment to form a melt blend, extrusion spinning the melt blend to form pigmented polyamide yarns, tufting (1) the pigmented polyamide yarns and (2) white dyeable polyamide yarns into a carpet, and overdyeing the carpet with an amount of acid dye sufficient to produce the multicolored textured carpet. The color pigment and the acid dye are selected to provide desired multicolored effect in the carpet. The multicolored textured carpet having deeper color and dye light fastness is also disclosed.
    Type: Application
    Filed: July 24, 2006
    Publication date: January 24, 2008
    Applicant: INVISTA NORTH AMERICA S.AR.L.
    Inventor: Sundar Mohan Rao
  • Patent number: 7320766
    Abstract: Dyed yarns typically have inferior color fastness compared with pigmented yarns. However, dyeing offers a virtually infinite selection of colors, flexibility and more uniformity than constructions of pigmented yarns in residential carpet and other yarn applications, such as apparel. It has been found that relatively small amounts of pigment (10 to 1000 ppm) incorporated into polymeric fibers, and particularly nylon fibers used in carpets, creates lightly pigmented yarns which, when overdyed, are highly uniform and have a higher degree of apparent dye light fastness compared to normal dyed yarns. This effect is observable for both anionic and cationic polyamide polymers, and dyeing of these slightly pigmented yarns can be conducted to produce yarns of almost any color of greater depth than the base yarn.
    Type: Grant
    Filed: February 25, 2004
    Date of Patent: January 22, 2008
    Assignee: INVISTA North America S.ar.l.
    Inventor: Sundar Mohan Rao
  • Patent number: 6090494
    Abstract: A shaped article is disclosed which is formed from a polymer mixture of polyamide polymer, pigment dispersed in a polymeric carrier and about one-half to nine percent free polyester based on the weight of the polymer mixture. A process for making the shaped article is also disclosed, wherein the polymer mixture is melted, mixed and formed into the shaped article. The invention is especially suited for use in forming multifilament yarn, where the use of the invention facilitates the spinning of yarns containing difficult-to-spin pigments. The invention may be advantageously employed using conventional polyamide melt-spinning techniques.
    Type: Grant
    Filed: March 9, 1998
    Date of Patent: July 18, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Sundar Mohan Rao