Patents Assigned to DuPont Safety & Construction, Inc.
  • Patent number: 11027520
    Abstract: A tape having a first face comprising a continuous surface of mica paper and a second face comprising a support layer, wherein the mica paper comprises 70 to 99 weight percent mica and 1 to 30 weight percent binder and the support layer comprises a film, a paper, a nonwoven fabric, or a woven fabric; wherein the initial elongation of the support layer is equal to or less than the initial elongation of the mica paper; and wherein the support layer is demountably attached to the mica paper such that when a delamination force of 10 N/10 mm or less is imposed on the support layer it can be separated from the mica paper.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: June 8, 2021
    Assignee: DUPONT SAFETY & CONSTRUCTION, INC.
    Inventor: Byoung Sam Kang
  • Patent number: 11021611
    Abstract: A composition comprises an alpha, omega-telechelic silyl-terminated polymer and a plasticizer wherein (i) the Fedors Solubility Parameter difference between the polymer and the plasticizer is no greater than 0.8, (ii) the polymer plus plasticizer comprises from 30 to 80 weight percent of the composition, and (iii) the polymer comprises from 10 to 70 weight percent of the combined weight of polymer and plasticizer.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: June 1, 2021
    Assignee: DUPONT SAFETY & CONSTRUCTION, INC.
    Inventor: Patrick Henry Young
  • Patent number: 10982353
    Abstract: A yarn comprising a plurality of bicomponent filaments having a first region comprising a first polymer composition and a second region comprising a second polymer composition; the regions being distinct and present in the bicomponent filaments in a sheath-core structure or a side-by-side structure; wherein the first polymer composition comprises aramid polymer containing 0.5 to 20 weight percent homogeneously dispersed discrete carbon particles and the second polymer composition comprises aramid polymer being free of discrete carbon particles and having at least one homogeneously dispersed masking pigment, the yarn having a total content of 0.5 to 5 weight percent discrete carbon particles.
    Type: Grant
    Filed: August 4, 2017
    Date of Patent: April 20, 2021
    Assignee: DUPONT SAFETY & CONSTRUCTION, INC.
    Inventors: Mark William Andersen, Mark T. Aronson, Christopher William Newton, Thomas Wayne Steinruck, B Lynne Wiseman, Reiyao Zhu
  • Patent number: 10954609
    Abstract: This invention relates to a yarn, and a process for making the yarn, the yarn comprising a plurality of spun filaments having a distinct, continuous, uniform-density sheath of a first polymer surrounding a distinct, continuous core of a second polymer; the first polymer further having a thermal decomposition temperature at least 50 degrees Celsius lower than the thermal decomposition temperature of the second polymer.
    Type: Grant
    Filed: July 13, 2016
    Date of Patent: March 23, 2021
    Assignee: DUPONT SAFETY & CONSTRUCTION, INC.
    Inventors: Mark T. Aronson, Alicia Marie Castagna, Joseph D Trentacosta, Paul Douglas Stull
  • Patent number: 10946631
    Abstract: Disclosed are thermoplastic composite laminates comprising in order of: (a) a top layer composed of at least one polycarbonate sheet; (b) a fabric layer composed of a fabric comprising aromatic polyamide fibers and an adhesion aid; and (c) a bottom layer composed of at least one polycarbonate sheet; wherein the adhesion aid comprises polycarbonate oligomers having a weight average molecular weight of about 6500 or less. Also disclosed are articles comprising or produced from the thermoplastic composite laminates.
    Type: Grant
    Filed: December 8, 2016
    Date of Patent: March 16, 2021
    Assignee: DUPONT SAFETY & CONSTRUCTION, INC.
    Inventors: Min Du, Qing Liang, Tao Song
  • Patent number: 10927238
    Abstract: A solid surface comprises (i) a crosslinked acrylic or unsaturated polyester resin present in an amount no greater than 52 volume fraction percent, and (ii) no greater than 48 volume fraction percent of inorganic filler particles distributed evenly throughout the solid surface wherein (a) 95-99 volume fraction percent of the filler particles has a major dimension in the range of from 0.5 to no greater than 10 microns, (b) the D50 of the filler particles is from 0.5-2.5 microns, and (c) the D90 of the filler particles is equal to or less than 10 microns.
    Type: Grant
    Filed: July 17, 2017
    Date of Patent: February 23, 2021
    Assignee: DUPONT SAFETY & CONSTRUCTION, INC.
    Inventors: Gregory Scott Blackman, Hee Hyun Lee, Keith William Pollak, Michael T Pottiger, Timothy Scott Wyant
  • Patent number: 10920028
    Abstract: A sheet having a plexifilamentary structure with a normalized Frazier air permeability of between 0.002 and 0.2 (m3/m2·minute)@50 gsm, and a normalized hydrohead of between 150 and 250 centimeters@50 gsm.
    Type: Grant
    Filed: June 16, 2015
    Date of Patent: February 16, 2021
    Assignee: DUPONT SAFETY & CONSTRUCTION, INC.
    Inventors: Jan Van Meerveld, Corneille Schmitz, Joseph Mathieu, Noel Stephen Brabbs, Orest Skoplyak, Christine Lemoine, Serge Rebouillat
  • Patent number: 10895036
    Abstract: A composite laminate comprising at least one moisture vapor permeable nonwoven sheet having first and second surfaces and a fluorinated polymeric coating on the first surface of the sheet wherein (i) the fluorinated polymeric coating is present in an amount such that the total fluorine content of the coated non-woven sheet is 0.05 to no greater than 0.4 gsm, and (ii) the composite laminate, after exposure to wet timber, exhibits a retained hydrohead of at least 60 percent.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: January 19, 2021
    Assignee: DUPONT SAFETY & CONSTRUCTION, INC.
    Inventors: Noel Stephen Brabbs, Eric Huebsch, Norbert Frey
  • Patent number: 10889995
    Abstract: A wall assembly comprises a first sidewall, a second sidewall and a rear wall, wherein a plurality of non-porous tiles are affixed to the first sidewall, the second sidewall and the rear wall of the wall assembly. Each first sidewall tile, second sidewall tile, and rear wall tile extends the full length of one dimension of the first sidewall, the second sidewall, and the rear wall, respectively. Both upper and lower edges of the first sidewall tiles, second sidewall tiles, and rear wall tiles comprise a chamfer optionally terminating short of a first end and a second end of the first and second sidewall tiles and rear wall tiles. The rear wall tiles comprise a dado located at each end of the rear wall tile that provides a hidden connection with the first and second sidewall tiles. The first and second sidewall tiles and the rear wall tiles are of a synthetic or natural material.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: January 12, 2021
    Assignee: DUPONT SAFETY & CONSTRUCTION, INC.
    Inventors: Yuka Midorikawa-Haelters, Matthew Schmitt, Donald Strum, Robert Beale Van Varick, Barry D Olson, Jeffrey Hutchins, Kevin Urbanski
  • Patent number: 10773488
    Abstract: A non-fibrous oriented polyethylene monolayer comprising ultra high molecular weight polyethylene, the polyethylene having a viscosity-average molecular weight of 2,000,000 or greater, wherein (i) the monolayer has a width of 10.0 mm or greater and a modulus of at least 100 N/tex, (ii) the monolayer has a tan ? when measured in dynamic mechanical analysis (DMA) of tensile response in a frequency sweep between 0.1 Hz?f?1.0 Hz meeting the inequality of tan ?<1/(f×a)+b?(f×c) where a=120, b=0.045 and c=0.016, and (iii) the monolayer has a maximum areal weight of no greater than 45 gsm.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: September 15, 2020
    Assignee: DUPONT SAFETY & CONSTRUCTION, INC.
    Inventors: Kenneth C Harding, James Neal Singletary
  • Patent number: 10767316
    Abstract: A paper comprises from 60 to 99 weight percent of a aramid fibrous pulp and from 1 to 40 weight percent of a polyvinylpyrrolidone coating on the fiber surface, the coating being neither chemically nor electrostatically bound to the fibers. A friction paper composite comprising the paper and a resin coating is also described.
    Type: Grant
    Filed: October 22, 2018
    Date of Patent: September 8, 2020
    Assignee: DUPONT SAFETY & CONSTRUCTION, INC.
    Inventor: Mehdi Afshari
  • Patent number: 10639590
    Abstract: A filtration system for liquid, particularly raw water, having at least one filtration module for filtering the liquid, a first inlet pipe for feeding liquid to the filtration module, a second inlet pipe for feeding liquid to the filtration module and at least one outlet pipe for discharging filtrate from the filtration module. A cleaning branch is arranged between the first inlet pipe and the second inlet pipe, and at least one dosing feeder for adding a cleaning chemical is connected to the cleaning branch. Additionally, a method for chemically rinsing such a filtration, wherein a cleaning chemical is added via a dosing feeder connected to a cleaning branch which is arranged between the first inlet pipe and the second inlet pipe.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: May 5, 2020
    Assignee: DUPONT SAFETY & CONSTRUCTION, INC
    Inventors: Christian Staaks, Peter Berg
  • Patent number: 10589136
    Abstract: This invention concerns a disposable protective garment comprising a protective fabric, the garment being provided with at least one continuous line of flexible sealing material extending from the neck opening to at least one other opening in the garment, the continuous line of sealing material forming a liquid-impervious seal between the first and second parts of protective fabric in the garment; wherein the sealing material has a tensile strength less than the tensile strength of the protective fabric and the continuous line of flexible sealing material can be torn open by the wearer for doffing of the garment. This invention also concerns a disposable protective garment wherein the at least one continuous line of flexible sealing material extends from a torso opening to at least one pants sleeve opening.
    Type: Grant
    Filed: February 1, 2016
    Date of Patent: March 17, 2020
    Assignee: DUPONT SAFETY & CONSTRUCTION, INC.
    Inventor: Muriel Samaniego
  • Patent number: 10590567
    Abstract: A yarn comprising a plurality of bicomponent filaments having a first region comprising a first polymer composition and a second region comprising a second polymer composition, each of the first and second regions being distinct in the bicomponent filaments; each bicomponent filament comprising 5 to 60 weight percent of the first polymer composition and 95 to 40 weight percent of the second polymer composition; wherein the first polymer composition comprises aramid polymer containing 0.5 to 20 weight percent discrete homogeneously dispersed carbon particles and the second polymer composition comprises modacrylic polymer being free of discrete carbon particles; the yarn having a total content of 0.1 to 5 weight percent discrete carbon particles.
    Type: Grant
    Filed: August 4, 2017
    Date of Patent: March 17, 2020
    Assignee: DUPONT SAFETY & CONSTRUCTION, INC.
    Inventors: Mark William Andersen, Mark T. Aronson, Christopher William Newton, Thomas Wayne Steinruck, B Lynne Wiseman, Reiyao Zhu
  • Patent number: 10590565
    Abstract: The present invention is directed toward an apparatus comprising a high speed rotating disk or bowl for nanofiber spinning from the rotational sheared thin film fibrillation at the enclosed serrations with the optimized stretching zone to produce the defects-free nanofibrous web and nanofibrous membrane comprising a nanofiber network with a number average nanofiber diameter less than 500 nm that yield the crystallinity higher than the polymer resin used in making the web.
    Type: Grant
    Filed: February 1, 2019
    Date of Patent: March 17, 2020
    Assignee: DUPONT SAFETY & CONSTRUCTION, INC.
    Inventors: Tao Huang, Thomas Patrick Daly, Zachary R Dilworth
  • Patent number: D905971
    Type: Grant
    Filed: October 3, 2019
    Date of Patent: December 29, 2020
    Assignee: DUPONT SAFETY & CONSTRUCTION, INC.
    Inventor: Massimo Fucci
  • Patent number: D907929
    Type: Grant
    Filed: October 3, 2019
    Date of Patent: January 19, 2021
    Assignee: DUPONT SAFETY & CONSTRUCTION, INC.
    Inventor: Massimo Fucci
  • Patent number: D909763
    Type: Grant
    Filed: October 3, 2019
    Date of Patent: February 9, 2021
    Assignee: DUPONT SAFETY & CONSTRUCTION, INC.
    Inventor: Massimo Fucci
  • Patent number: D909764
    Type: Grant
    Filed: October 3, 2019
    Date of Patent: February 9, 2021
    Assignee: DUPONT SAFETY & CONSTRUCTION, INC.
    Inventor: Massimo Fucci
  • Patent number: D909765
    Type: Grant
    Filed: October 3, 2019
    Date of Patent: February 9, 2021
    Assignee: DUPONT SAFETY & CONSTRUCTION, INC.
    Inventors: Massimo Fucci, Hae Yeon Lee