Ashish Dubey

US Patent:

6620487, Sep 16, 2003

Filed:

Nov 21, 2000

Appl. No.:

09/721188

Inventors:

Timothy D. Tonyan - Wheaton IL
David M. Bonen - Skokie IL
Ashish Dubey - Grayslake IL
Kumar C. Natesaiyer - Grayslake IL

Assignee:

United States Gypsum Company - Chicago IL

International Classification:

B32B 2302

US Classification:

428192, 428 60, 106735

Abstract:

A reinforced, lightweight, dimensionally stable panel capable of resisting shear loads when fastened to framing equal to or exceeding shear loads provided by plywood or oriented strand board panels. The panels employ a core of a continuous phase resulting from the curing of an aqueous mixture of calcium sulfate alpha hemihydrate, hydraulic cement, an active pozzolan and lime, the continuous phase being reinforced with alkali-resistant glass fibers and containing ceramic microspheres, or a blend of ceramic and polymer microspheres, or being formed from an aqueous mixture having a weight ratio of water-to-reactive powder of 0. 6/1 to 0. 7/1 or a combination thereof. At least one outer surface of the panels may include a cured continuous phase reinforced with glass fibers and containing sufficient polymer spheres to improve nailability or made with a water-to-reactive powders ratio to provide an effect similar to polymer spheres, or a combination thereof.

US Patent:

8061257, Nov 22, 2011

Filed:

Feb 27, 2009

Appl. No.:

12/394564

Inventors:

Timothy D. Tonyan - Wheaton IL, US
William A. Frank - Lake Villa IL, US
Ashish Dubey - Grayslake IL, US
Kumar Natesaiyer - Grayslake IL, US
Bartley P. Durst - Clinton MS, US
Pamela G. Kinnebrew - Vicksburg MS, US
Toney K. Cummins - Vicksburg MS, US
Nicholas Boone - Vicksburg MS, US
William F. Heard - Clinton MS, US
Michael J. Roth - Raymond MS, US
Thomas Slawson - Vicksburg MS, US
James L. Davis - Vicksburg MS, US
Ryan Stinson - Vicksburg MS, US
Carol F. Johnson - Vicksburg MS, US

Assignee:

United States Gypsum Company - Chicago IL

International Classification:

F41H 5/02

US Classification:

89 3602, 89901, 89903, 89920, 428911, 109 495

Abstract:

A cementitious armor panel assembly including cementitious armor panel with ballistic and blast resistant properties attached to a frame structure to produce a protective structure. The cementitious armor panels have a continuous phase resulting from the curing of an aqueous mixture of an inorganic cement binder, an inorganic mineral filler having a particle size of about 150-450 microns, a pozzolanic mineral filler, a polycarboxylate based superplasticizer self-leveling agent, and water. The mixture may also contain alkanolamine, and acid or acid salt. Prior to curing, the continuous phase is reinforced with fiber uniformly distributed in the continuous phase before it is cured to form the panel. The panel may be reinforced with a skin attached to at least one surface of the panel.

US Patent:

8062741, Nov 22, 2011

Filed:

Feb 27, 2009

Appl. No.:

12/394396

Inventors:

Timothy D. Tonyan - Wheaton IL, US
William A. Frank - Lake Villa IL, US
Ashish Dubey - Grayslake IL, US
Cesar Chan - Vernon Hills IL, US
Bartley P. Durst - Clinton MS, US
Pamela G. Kinnebrew - Vicksburg MS, US
Toney K. Cummins - Vicksburg MS, US
Nicholas Boone - Vicksburg MS, US
William F. Heard - Clinton MS, US
Michael J. Roth - Raymond MS, US
James L. Davis - Vicksburg MS, US

Assignee:

U.S. Gypsum Company - Chicago IL

International Classification:

B32B 13/02

US Classification:

4282947, 428703

Abstract:

A cementitious panel with ballistic and blast resistant properties having a core layer of ultra-high compressive strength composite and at least one skin layer. The panels can also be used in walls, ceiling and flooring panels which require high compressive strength for resistance to earthquakes and surfaces resistant to surface abuse such as in prison and other institutions. The panel core layer has a continuous cementitious phase resulting from the curing of an aqueous mixture, in the absence of silica flour, of inorganic cement binder, inorganic mineral filler having a particle size of about 150-450 microns, a pozzolanic mineral filler, polycarboxylate based superplasticizer, alkanolamine and acid or alkali metal acid salt; and water. The mixture may be uniformly reinforced with fiber added before curing. The cementitious core layer is then reinforced with the skin, such as fiber reinforced polymer, attached to at least one panel surface.

US Patent:

8137490, Mar 20, 2012

Filed:

Feb 27, 2009

Appl. No.:

12/394506

Inventors:

William A. Frank - Lake Villa IL, US
Ashish Dubey - Grayslake IL, US

Assignee:

United States Gypsum Company - Chicago IL

International Classification:

B32B 3/18

US Classification:

156 42, 156 39, 156 45

Abstract:

A process for making a fiber reinforced cementitious product such as a panel which hardens to an ultra-high compressive strength composite for use in making panels with ballistic and blast resistant properties. The panel has a continuous phase resulting from curing an aqueous mixture, in the absence of silica flour, of inorganic cement binder, inorganic mineral filler having a particle size of about 150-450 microns, pozzolanic mineral filler, and polycarboxylate based superplasticizer self-leveling agent, and water. The mixture may also include alkanolamine and acid or acid salt. The continuous phase may be reinforced with fiber distributed in the continuous phase before curing to form a panel. The panel may be reinforced with a fiber reinforced skin attached to at least one surface of the core, e. g. , by lamination with an adhesive, e. g.

US Patent:

20060188674, Aug 24, 2006

Filed:

Jan 18, 2006

Appl. No.:

11/334166

Inventors:

Mark Fernette - Lisle IL, US
James Reicherts - Cary IL, US
Ashish Dubey - Grayslake IL, US

International Classification:

B28B 11/00

US Classification:

428034400

Abstract:

A packaged membrane is adapted to be sold, stored and transported to the site of use. The membrane includes a base mat and a flexible cement-based coating applied to the base mat. The coating includes a hydraulic component and water. The membrane is then rolled and packaged in a tubular package. Preferably, the coating also includes a water-soluble, film forming polymer. It is also preferred that the hydraulic component include at least 50% fly ash by weight.