Patents Assigned to DuPont Safety & Construction, Inc.
  • Patent number: 10570280
    Abstract: A solid surface comprises (i) from 45 to 80 volume fraction percent of polymethylmethacrylate or unsaturated polyester or a combination of both, (ii) from 25 to 55 volume fraction percent of inorganic filler particles distributed evenly throughout the solid surface, and (iii) from 0.75 to 8 volume fraction percent of a siloxane fluid, wherein, when the filler has a major dimension of from 30-50 micrometers, the siloxane has a molecular weight of from 40,000 to 150,000 or when the filler has a major dimension of from 10-15 micrometers, the siloxane has a molecular weight of from 25,000 to 100,000 or when or when the filler has a major dimension of from 1-10 micrometers, the siloxane has a molecular weight of from 5,000 to 100,000.
    Type: Grant
    Filed: April 17, 2018
    Date of Patent: February 25, 2020
    Assignee: DUPONT SAFETY & CONSTRUCTION, INC.
    Inventors: Keith William Pollak, Timothy Scott Wyant
  • Patent number: 10458964
    Abstract: Methods for measuring the sulfur content in a plurality of individual sulfur-containing fiber or article samples, comprising: a) contacting a plurality of samples with a solution comprising potassium hydroxide to convert the sulfur to potassium sulfate; b) concurrently and individually combusting the plurality of samples from step a) in a furnace at a temperature of greater than 650° C. to remove essentially all organic materials to produce a plurality of residues; c) dissolving each of the pluralities of residue in concentrated nitric acid to form individual residue solutions; and d) analyzing the individual residue solutions with Inductively Coupled Plasma (ICP) Emission Spectrometry to determine the sulfur content of each sample.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: October 29, 2019
    Assignee: DUPONT SAFETY & CONSTRUCTION INC.
    Inventor: Jonathan Samuel Tschritter
  • Patent number: 10457013
    Abstract: This invention is directed to a non-rigid composite sheet comprising in order (i) a first component having an areal weight of from 88 to 678 gsm comprising a first fabric of filamentary yarns having a tenacity of at least 11 g/dtex and a UV and weather impervious first polymeric layer. (ii) a second component having an areal weight of from 120 to 430 gsm comprising a flame resistant paper and (iii) a third component having an areal weight of from 88 to 678 gsm comprising a second fabric of filamentary yarns having a tenacity of at least 11 g/dtex and an impact and scratch resistant second polymeric layer, the second fabric of the third component being adjacent to the paper of the second component.
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: October 29, 2019
    Assignee: DuPont Safety & Construction, Inc.
    Inventors: Dariusz Wlodzimierz Kawka, Tomas L. Perez