公开(公告)号：US10919808B2

公开(公告)日：2021-02-16

申请号：US15934088

申请日：2018-03-23

Applicant: United States Gypsum Company

Inventor： Yijun Sang ,  Brian J. Christ

IPC: C04B28/14 ,  C04B24/38 ,  C04B22/16 ,  E04C2/04 ,  B28B11/14 ,  B28B11/24 ,  B28B17/02 ,  C04B111/00

Abstract: Disclosed are product (e.g., panels), slurry, and methods relating to an uncooked starch having a mid-range peak viscosity (i.e., from about 120 Brabender Units to about 900 Brabender Units).

公开(公告)号：US10913087B2

公开(公告)日：2021-02-09

申请号：US15248923

申请日：2016-08-26

Applicant: United States Gypsum Company

Inventor： Paula Hajakian

IPC: B05C1/08 ,  D21F11/00 ,  B01D47/10 ,  B05C15/00 ,  B05C21/00 ,  B05D1/28 ,  B05D3/12 ,  D21H21/36 ,  D21H27/18

Abstract: Embodiments of a system and a method for preparing mold-resistant paper comprising a wet scrubber assembly in fluid communication with at least one collection plenum disposed at an operational area of a paper manufacturing line. The wet scrubber assembly can be operated to draw a stream of exhaust air from the operational area of the paper manufacturing line through the wet scrubber assembly to remove particulate from the exhaust stream. Such systems and methods can be used to produce mold-resistant paper by coating a paper with an antimicrobial composition including at least one antimicrobial additive at the calendering stage. The collection plenum can be placed in proximate relationship with the calendering stack such that the amount of antimicrobial additive particulate in the air at the calendering stage is reduced. The mold-resistant paper can be used in a gypsum panel.

公开(公告)号：US10900237B2

公开(公告)日：2021-01-26

申请号：US15461232

申请日：2017-03-16

Applicant: UNITED STATES GYPSUM COMPANY

Inventor： Tyler Kincaid ,  David D. Pelot ,  Salvatore C. Immordino, Jr.

IPC: E04F13/04 ,  D21H21/30

Abstract: An identifiable wallboard joint tape is provided and includes a web of tape incorporated with an identifier such that the tape is visible under UV light and visually distinguishable from the surrounding wallboard joint and joint compound.

公开(公告)号：US20210017082A1

公开(公告)日：2021-01-21

申请号：US16812827

申请日：2020-03-09

Applicant: UNITED STATES GYPSUM COMPANY

Inventor： Alexander J. Donovan ,  Tyler Kincaid ,  David Pelot ,  Richard B. Stevens ,  Robert H. Negri ,  Naveen Punati

IPC: C04B28/14 ,  C04B24/04 ,  C04B24/38

Abstract: A joint compound including calcium sulfate hemihydrate and/or at least one filler, wherein a total amount of the at least one filler and/or calcium sulfate hemihydrate is at least about 50 wt % of the joint compound on a dry (water-free) basis, preferably the filler comprises calcium carbonate, calcium sulfate dihydrate, or calcium sulfate anhydrite, or a mixture thereof; binder at up to about 15 wt % of the joint compound on a dry basis; polymer thickener at up to about 3 wt % of the joint compound on a dry basis; plasticizer dedusting agent at about 0.01 to about 3 wt % of the joint compound on a dry (water free) basis; and an additive up to about 10 wt % of the joint compound on a dry basis.

公开(公告)号：US20200262180A1

公开(公告)日：2020-08-20

申请号：US16581070

申请日：2019-09-24

Applicant: United States Gypsum Company

Inventor： Mark Hemphill ,  Yijun Sang

IPC: B32B13/08 ,  B32B7/02 ,  C04B28/14 ,  E04B2/72 ,  E04C2/26

Abstract: Disclosed is a composite gypsum board comprising a board core comprising set gypsum sandwiched between face and back cover sheets. The composite gypsum board also comprises an intermediate sheet between the board core and the face cover sheet, with a thin, dense gypsum layer disposed between the intermediate sheet and the face cover sheet. Optionally, a second dense gypsum layer can be disposed between a first major side of the board core and the back cover sheet. Also disclosed is a method of preparing a composite gypsum board in which an intermediate sheet is applied over a dense gypsum layer disposed on a face cover sheet. A back cover sheet is applied to the other major side of the board core, with a second dense gypsum layer optionally disposed therebetween.

公开(公告)号：US20200261864A1

公开(公告)日：2020-08-20

申请号：US16783856

申请日：2020-02-06

Applicant: United States Gypsum Company

Inventor： David R. BLACKBURN ,  Dayakar Thoddu CHANDRASEKARAN ,  Erin FINLEY ,  Nabin KAINI ,  Tyler KINCAID ,  Charles J. MILLER ,  Michael PARK

IPC: B01F3/12 ,  B01F7/08 ,  B01F13/10 ,  B01F15/02

Abstract: Embodiments of a system and a method for continuously manufacturing a joint compound can be used to produce ready mix joint compound. The system includes means for continuously mixing wet and dry joint compound ingredients together and means for homogenizing multiple volumetric units of mixed joint compound to reduce variation in at least one joint compound material property (e.g., viscosity) across multiple successively produced volumetric units of mixed joint compound (relating to standard commercial packaging sizes for joint compound, such as five-gallon pails, for example) relative to the material property of the respective multiple volumetric units before passing through the means for homogenizing.

公开(公告)号：US10646837B2

公开(公告)日：2020-05-12

申请号：US16361551

申请日：2019-03-22

Applicant: UNITED STATES GYPSUM COMPANY

Inventor： Ashish Dubey ,  Peter B. Groza ,  Christopher R. Nelson

IPC: B28B3/22 ,  B01F7/00 ,  B28B1/52 ,  B28B5/02 ,  B28C5/12 ,  B28C5/14 ,  B28C5/40 ,  B29B7/48 ,  B29C48/67 ,  B29C48/00 ,  B29B7/42 ,  B29C48/40 ,  B29C48/57 ,  B01F3/12 ,  B01F7/04 ,  B01F7/06 ,  B01F7/08 ,  B01F13/10 ,  B01F15/02

Abstract: A method in which a stream of dry cementitious powder from a dry powder feeder passes through a dry cementitious powder inlet conduit to feed a first feed section of a fiber-slurry mixer. An aqueous medium stream passes through at least one aqueous medium stream conduit to feed a first mixing section the fiber-slurry mixer. A stream of reinforcing fibers passes from a fiber feeder through a reinforcing fibers stream conduit to feed a second mixing section of the fiber-slurry mixer. The stream of dry cementitious powder, aqueous medium stream, and stream of reinforcing fibers combine in the fiber-slurry mixer to make a stream of fiber-cement mixture which discharges through a discharge conduit at a downstream end of the mixer.

公开(公告)号：US10597327B2

公开(公告)日：2020-03-24

申请号：US16244689

申请日：2019-01-10

Applicant: UNITED STATES GYPSUM COMPANY

Inventor： Ashish Dubey

IPC: C04B28/00 ,  C04B28/18 ,  C04B12/00 ,  C04B7/32 ,  C04B22/10 ,  C04B111/00 ,  C04B111/34 ,  C04B111/62 ,  C04B111/72 ,  C04B103/22 ,  C04B103/32

Abstract: A method for making geopolymer cementitious binder compositions for cementitious products such as concrete, precast construction elements and panels, mortar and repair materials, and the like is disclosed. The geopolymer cementitious compositions of some embodiments are made by mixing a synergistic mixture of thermally activated aluminosilicate mineral, calcium aluminate cement, a calcium sulfate and a chemical activator with water.

公开(公告)号：US20200055277A1

公开(公告)日：2020-02-20

申请号：US16401675

申请日：2019-05-02

Applicant: UNITED STATES GYPSUM COMPANY

Inventor： Mark HEMPHILL ,  Qinghua LI ,  Charles W. COCHRAN

IPC: B32B13/08 ,  B32B29/06 ,  B32B29/00 ,  B32B3/26 ,  C04B28/14

Abstract: Gypsum boards formed from synthetic gypsum and other gypsum sources having high chloride salt concentrations. The gypsum boards may include a set gypsum board core layer between a front and back paper cover sheets. The back paper cover sheet has a plurality of perforations extending therethrough. Methods of making the gypsum boards, and a wall system for employing the gypsum boards, are also provided. The concentration of the chloride anion in aqueous gypsum slurry used to make the set gypsum board core layer and to perform the methods of the invention may range from about 500 ppm to about 3000 ppm, typically from about 500 ppm to about 2000 ppm per 1,000,000 parts by weight calcium sulfate hemihydrate, more typically from about 500 ppm to about 1500 ppm per 1,000,000 parts by weight calcium sulfate hemihydrate.

公开(公告)号：US10563408B2

公开(公告)日：2020-02-18

申请号：US14466736

申请日：2014-08-22

Applicant: United States Gypsum Company

Inventor： Guy Rosenthal

IPC: E04F13/04 ,  B32B37/14 ,  E04F21/165

Abstract: A joint tape for drywall includes a substrate layer having an elongate shape in a lengthwise direction and being flexible in the lengthwise direction and in a transverse direction. The tape further includes a covering layer disposed in bonding relation on the substrate layer. The covering layer is rigid in the transverse direction and configured to withstand compressive forces applied generally in the transverse direction and shear stresses applied generally along the transverse direction.