United States Gypsum Company

Beloit Technologies, Inc.

Cox Communications, Inc.

Knauf Gips Kg

Sedna Patent Services, LLC

Comcast IP Holdings I, LLC

Alfred C Li

Weixin David Song

James Wittbold

Annamaria Vilinska

Rex A Becker

William Rago

Yijun Sang

Ronald Edward Schenck

Brian J Christ

Gregg G Diefenbacher

Fredrick T Jones

Michael Patrick Shake

Donald F Gordon

Edward Anthony Ludvig

Qiang Yu

Chris C Lee

Cesar Chan

David R Blackburn

James R Burns

Bradley W Todd

Ronald E Schenck

Christopher Robert Nelson

Sadik Bayrakeri

Ashish Dubey

John P Comito

Jeremy S Edmonds

Chris Lee Nelson

Eugene Gershtein

Qingxia Liu

Srinivas Veeramasuneni

Bruce Lynn Petersen

Michael J Porter

Brent E Groza

Wenqi Luan

Curt Loring

Runhai Lu

Richard James Haszel

Sharon Louise Tracy

John L Fall

Joe W Chambers

Aaron Greengard

D Paul Miller

Mario Dupuis

Iordana Triantafillu

Curtis B Loring

Francis Loiseau

David Song

Thomas D Rogers

Richard E Hergert

Leroy H Busker

Mark B Scalf

Naveen Punati

Wei Xu

Te Hua Lau

Naser Aldabaibeh

Frank J Wywialowski

Gerald R Garde

Jenner Omodt

Luis Carrazco

James P Alfano

Xuekui Lan

Eugene E Neill

Rudy A Schermann

Blair C Walker

Stephen P Erickson

Jose Luis Carrazco

Angel Arturo Rueda

Bill Rago

Arthur Kennedy

Kristin McKeever, Legal Representative

Christopher C Lee

Pamela K Hynnek

James R Wittbold

Arthur (deceased) Kennedy

David R Backburn

Richard J Haszel

Brent Groza

Weixin D Song

William J Rago

Sharon L Tracy

Chris Lee

Paul Miller

A method for making a gypsum board including:

Methods for reclaiming gypsum panels that contain hydrophobic materials and use thereof

Disclosed is a foam modifier, e.g., useful for gypsum or cement slurries. The foam modifier comprises a fatty alcohol that is added to a gypsum or cement slurry that includes foaming agent, such as an alkyl sulfate surfactant. The fatty alcohol can be a C-Cfatty alcohol in some embodiments. The use of such a foam modifier can be used, for example, to stabilize the foam, reduce waste of foaming agent, improve void size control in the final product, and improve the gypsum board manufacturing process.

Foam modifiers for gypsum slurries, methods, and products

Disclosed is a composite gypsum board comprising a board core and a concentrated layer of substantial thickness (e.g., at least about 0.02 inches). The concentrated layer includes a higher weight percentage of an enhancing additive than the hoard core. The board core has a thickness greater than the thickness of the concentrated layer and forms the bulk of the board volume. The concentrated layer has a higher density (e.g., at least about 1.1 times greater) than the density of the board core. Also disclosed is a method of preparing a composite gypsum board.

Composite gypsum board and methods related thereto

Disclosed is a composite gypsum board comprising a board core and a concentrated layer, as well as related methods of preparing board and slurries. The board core and the concentrated layer both are formed from water and stucco. The concentrated layer is designed to have higher density and/or nail pull than the core. The concentrated layer is further formed from a polysaccharide that forms a complex with calcium ions, e.g., an alginate compound such as sodium alginate. In some embodiments, the concentrated layer is formed from an enhancing additive to enhance strength therein, while the core is formed without using enhancing additive or less enhancing additive than used in forming the board core.

Multi-layer gypsum board and related methods and slurries

Disclosed is a method and system for blending a foam modifier with foaming agent on-line, e.g., as may be particularly useful for gypsum or cement slurries. The foam modifier comprises a fatty alcohol that is added to a gypsum or cement slurry that includes foaming agent, such as an alkyl sulfate surfactant. The fatty alcohol can be a C-Cfatty alcohol in some embodiments. The use of such a foam modifier can be used, for example, to stabilize the foam, reduce waste of foaming agent, improve void size control in the final product, and improve the gypsum board manufacturing process.

Method and system for on-line blending of foaming agent with foam modifier for addition to cementitious slurries

Disclosed is a composite gypsum board comprising a board core and a concentrated layer of substantial thickness (e.g., at least about 0.02 inches). The concentrated layer includes a higher weight percentage of an enhancing additive than the board core. The board core has a thickness greater than the thickness of the concentrated layer and forms the bulk of the board volume. The concentrated layer has a higher density (e.g., at least about 1.1 times greater) than the density of the board core. Also disclosed is a method of preparing a composite gypsum board.

A gypsum slurry includes water, a hydraulic component including calcium sulfate hemihydrate and a linear polycarboxylate dispersant. The linear polycarboxylate anionic dispersant includes a first monomeric repeating unit and a second monomeric repeating unit. The first repeating unit of the linear polycarboxylate dispersant is an olefinic unsaturated carboxylic acid repeating unit or salt thereof. The second repeating unit of the linear polycarboxylate dispersant is a vinyl sulfonate. The slurry can be made into a gypsum panel. Methods of making gypsum slurry and a gypsum panel are also disclosed.

Gypsum slurries with linear polycarboxylate dispersants

Disclosed is a method and system for blending a foam modifier with foaming agent online, e.g., as may be particularly useful for gypsum or cement slurries. The foam modifier comprises a fatty alcohol that is added to a gypsum or cement slurry that includes foaming agent, such as an alkyl sulfate surfactant. The fatty alcohol can be a C-Cfatty alcohol in some embodiments. The use of such a foam modifier can be used, for example, to stabilize the foam, reduce waste of foaming agent, improve void size control in the final product, and improve the gypsum board manufacturing process.

Provided are wallboard panels comprising laminated multi-ply paper cover sheets bonded with a non-ionic polymeric binder and a cross-linker, and methods for making the wallboard panels.

Gypsum wallboard comprising laminated multi-ply paper cover sheets bonded with a non-ionic polymeric binder and methods

A durable, moisture-resistant gypsum product is provided with smooth furnish which comprises a laminated glass fiber mat in which glass fibers are compressed and cross-linked with a thermosetting polymeric resin. Methods for making these gypsum products and glass fiber mats are provided as well.

Method to improve surface finish of glass fiber mat

Disclosed is a composite gypsum board comprising a hoard core and a concentrated layer of substantial thickness (e.g., at least about 0.02 inches). The concentrated layer includes a higher weight percentage of an enhancing additive than the board core. The board core has a thickness greater than the thickness of the concentrated layer and forms the bulk of the board volume. The concentrated layer has a higher density (e.g., at least about 1.1 times greater) than the density of the board core. Also disclosed is a method of preparing a composite gypsum board.

Embodiments of a system and a method for determining a surface smoothness of a facing specimen can be used in connection with the manufacture of products, including cementitious products such as gypsum wallboard, for example. Such systems and methods can be used to generate a composite smoothness factor based upon a measured mottle value and topography value using stochastic frequency distribution analysis.

System and method for determining facer surface smoothness

Growing community of inventors

Naperville, IL, United States of America

Alfred C Li