Patents by Inventor Gregory T. Stewart

Gregory T. Stewart 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: 11135813
    Abstract: A fire retardant article has a wood-based material with a polyisocyanurate foam article attached thereto, where the polyisocyanurate foam article covers 90% or more of the exposed portion of the wood-based material, has a thickness greater than 1.8 centimeters, a foam core having a density of 28-128 kg/m3, a trimer concentration characterized by at least one of (i) a trimer level in a range of 12-25 weight-percent and (ii) a molar ratio of trimer to sum of urethane and urea in a range of 1-8, a phosphorous concentration of at least 0.3 wt %, a combined concentration of phosphorous and bromine of at least 0.5 wt %, and a vapor permeable and non-combustible facer on at least one primary surface of the foam core.
    Type: Grant
    Filed: July 31, 2017
    Date of Patent: October 5, 2021
    Assignee: DDP SPECIALTY ELECTRONIC MATERIALS US, LLC
    Inventors: Gregory T. Stewart, Matthew J. Kalinowski, Kshitish A. Patankar, Dakai Ren, Steven P. Crain, Ernest J. Herst, Daniel W. Cheney, Jeffrey K Olson, Tyler G. Congleton
  • Publication number: 20210001604
    Abstract: A fire-retardant laminate consists of a metallic foil having first and second surfaces, a primer layer having first and second surfaces, the first surface of the primer layer being attached to the first surface of the metallic foil and a fire-retardant coating applied on the second surface of the primer layer, wherein the fire-retardant coating comprises an aromatic isocyanate component, a polyol component and an intumescent component.
    Type: Application
    Filed: June 29, 2020
    Publication date: January 7, 2021
    Inventors: Gregory T. Stewart, Piyush Soni, Mark W. Beach, Kali Ananth Survadevara
  • Publication number: 20200189241
    Abstract: A fire retardant article has a wood-based material with a polyisocyanurate foam article attached thereto, where the polyisocyanurate foam article covers 90% or more of the exposed portion of the wood-based material, has a thickness greater than 1.8 centimeters, a foam core having a density of 28-128 kg/m3, a trimer concentration characterized by at least one of (i) a trimer level in a range of 12-25 weight-percent and (ii) a molar ratio of trimer to sum of urethane and urea in a range of 1-8, a phosphorous concentration of at least 0.3 wt %, a combined concentration of phosphorous and bromine of at least 0.5 wt %, and a vapor permeable and non-combustible facer on at least one primary surface of the foam core.
    Type: Application
    Filed: July 31, 2017
    Publication date: June 18, 2020
    Inventors: Gregory T. Stewart, Matthew J. Kalinowski, Kshitish A. Patankar, Dakai Ren, Steven P. Crain, Ernest J. Herst, Daniel W. Cheney, Jeffrey K Olson, Tyler G. Congleton
  • Patent number: 10337198
    Abstract: An insulated spa cover (10) contains a thermal insulating core (30), a top cover (150) with an average permeance of at least 57.2 nanograms/Pascal*seconds*square meters, and a hydrostatic head test value of at least 5,000 Pascals, a vapor barrier (130) and optionally a bottom sheet (140) apart from the vapor barrier. Venting pathways are defined around the thermally insulating core to facilitate escape of water vapor.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: July 2, 2019
    Assignee: DOW GLOBAL TECHNOLOGIES LLC
    Inventors: W. Scott Young, Jeffrey M. Alcott, Gregory T. Stewart
  • Patent number: 10322385
    Abstract: A mixing device (10) containing a housing (20) that defines a mixing chamber (30), an A-component feed channel entrance opening (40), a B-component feed channel entrance opening (50), and air feed channel entrance opening (60), and an exit opening (70) where the feed channel entrance openings and exit opening provide fluid communication into and/or out of the mixing chamber, and a static mixing element (80) housed within the mixing chamber between the three entrance feed channels and the exit opening, wherein the air feed channel entrance opening having a cross sectional area that is 0.7 square mm or greater and 7.7 square mm or less.
    Type: Grant
    Filed: September 2, 2014
    Date of Patent: June 18, 2019
    Assignee: DOW GLOBAL TECHNOLOGIES LLC
    Inventors: Peter J. Schulz, Matthew J. Turpin, Gregory T. Stewart, Laura J. Dietsche, Daniel A. Beaudoin
  • Publication number: 20180243767
    Abstract: A dispenser (10) comprises a housing (20) defining at least three feed channels (23, 24, 25) and at least one dispensing channel (26), a spool valve (28, 30) with a spool (30) defining at least four flow passages (31, 32, 33, 34), a deformable sealing plug (40) in at least two (23, 24) of the feed channels and in sealing orientation with both the housing (22) and the spool (30), and a nipple (50) in at least the two feed channels (23, 24) of the housing (22) comprising the sealing plugs (40); wherein the spool (30) can reversibly rotate between an open orientation and a closed orientation can dispense two-component foam formulations and purges the dispensing channel when in the off position.
    Type: Application
    Filed: September 12, 2016
    Publication date: August 30, 2018
    Inventors: Gregory T. Stewart, Daniel R. Schroer, Timothy P. Fournier
  • Patent number: 10035155
    Abstract: A dispenser comprises a housing defining at least three feed channels, a spool valve with a spool defining at least three flow passages, a deformable sealing plug in at least two of the feed channels and in sealing orientation with both the housing and the spool, and a nipple in at least the two feed channels of the housing comprising sealing plugs; wherein the spool can reversibly rotate between an open orientation and a closed orientation can dispense two-component form formulations that are free of gaseous blowing agents.
    Type: Grant
    Filed: September 15, 2014
    Date of Patent: July 31, 2018
    Assignee: Dow Global Technologies LLC
    Inventors: Michael F. Heckert, Peter J. Schulz, Daniel R. Schroer, Matthew J. Turpin, Gregory T. Stewart, Jie Cai
  • Publication number: 20170314281
    Abstract: An insulated spa cover (10) contains a thermal insulating core (30), a top cover (150) with an average permeance of at least 57.2 nanograms/Pascal*seconds*square meters, and a hydrostatic head test value of at least 5,000 Pascals, a vapor barrier (130) and optionally a bottom sheet (140) apart from the vapor barrier. Venting pathways are defined around the thermally insulating core to facilitate escape of water vapor.
    Type: Application
    Filed: November 12, 2015
    Publication date: November 2, 2017
    Inventors: W. Scott Young, Jeffrey M. Alcott, Gregory T. Stewart
  • Publication number: 20170157628
    Abstract: A dispenser comprises a housing defining at least three feed channels, a spool valve with a spool defining at least three flow passages, a deformable sealing plug in at least two of the feed channels and in sealing orientation with both the housing and the spool, and a nipple in at least the two feed channels of the housing comprising sealing plugs; wherein the spool can reversibly rotate between an open orientation and a closed orientation can dispense two-component form formulations that are free of gaseous blowing agents.
    Type: Application
    Filed: September 15, 2014
    Publication date: June 8, 2017
    Applicant: Dow Global Technologies LLC
    Inventors: Michael F. Heckert, Peter J. Schulz, Daniel R. Schroer, Matthew J. Turpin, Gregory T. Stewart, Yein Jie Cai
  • Publication number: 20160175788
    Abstract: A mixing device (10) containing a housing (20) that defines a mixing chamber (30), an A-component feed channel entrance opening (40), a B-component feed channel entrance opening (50), and air feed channel entrance opening (60), and an exit opening (70) where the feed channel entrance openings and exit opening provide fluid communication into and/or out of the mixing chamber, and a static mixing element (80) housed within the mixing chamber between the three entrance feed channels and the exit opening, wherein the air feed channel entrance opening having a cross sectional area that is 0.7 square mm or greater and 7.7 square mm or less.
    Type: Application
    Filed: September 2, 2014
    Publication date: June 23, 2016
    Inventors: Peter J. Schulz, Matthew J. Turpin, Gregory T. Stewart, Laura J. Dietsche, Daniel A. Beaudoin
  • Publication number: 20090305008
    Abstract: Prepare an oriented polymer composition having a decorative appearance by a process including extruding an orientable polymer composition from an extruder, directing the orientable polymer composition through a calibrator and then drawing the orientable polymer composition, optionally through a drawing die, at a drawing temperature to form an oriented polymer composition wherein the process further includes disposing a colorant onto a surface of the oriented polymer composition prior to the calibrator, prior to the drawing die or both prior to a calibrator and prior to the drawing die in a pattern having a width of at least five millimeters and that preferably so that the colorant is at least partially located on a recessed portion of the resulting oriented polymer composition's surface and/or extends to a depth of at least one millimeter below the oriented polymer composition's surface.
    Type: Application
    Filed: June 4, 2009
    Publication date: December 10, 2009
    Inventors: Kevin L. Nichols, James J. O'Brien, Andrew T. Graham, Gregory T. Stewart, Claude Brown, JR.
  • Publication number: 20090152759
    Abstract: A solid state drawing die having a body with opposing entrance and exit ends, a shaping channel providing fluid communication entirely through the body from the entrance to exit end and having a converging profile, and at least one portion of the body that serves as a static protrusion extending into the but not all the way across the shaping channel is useful in a solid state drawing process for preparing oriented polymer compositions having indented or grooved profiles.
    Type: Application
    Filed: December 3, 2008
    Publication date: June 18, 2009
    Inventors: Bruce A. Malone, Gregory T. Stewart, Brett M. Birchmeier, Timothy O. Kirch