Mirza A K Baig

US Patent:

6443256, Sep 3, 2002

Filed:

Dec 27, 2000

Appl. No.:

09/748989

Inventors:

Mirza A. Baig - Lindenhurst IL

Assignee:

USG Interiors, Inc. - Chicago IL

International Classification:

E04B 182

US Classification:

181286, 181290

Abstract:

An acoustical ceiling tile having an improved sound absorption value and having a dual layer of acoustical materials. The base mat layer has either no mineral wool or a low mineral wool content. The surface layer has a high mineral wool content which provides improved sound absorption values with or without perforating or fissuring the tile. The dual layer acoustical ceiling tile has a noise reduction coefficient (NRC) value of at least about 0. 50.

US Patent:

7410688, Aug 12, 2008

Filed:

Aug 24, 2005

Appl. No.:

11/210581

Inventors:

Mirza A. Baig - Lindenhurst IL, US

Assignee:

USG Interiors, Inc. - Chicago IL

International Classification:

B32B 21/02

US Classification:

4282924, 4282927, 4282947, 4283124

Abstract:

A composite board comprising a core and a paper facer sheet adhesively laminated to one face of the core, the core including a mixture of perlite, binder, and cellulose fiber, the core being formed as a water slurry with said perlite, binder and cellulose fiber being uniformly distributed therein, the perlite being in an expanded state such that its particles include internal voids and exhibit a density of about 5 to about 15 pounds per cubic foot and being present in sufficient quantity to occupy in bulk at least 50% of the volume of the core, on a weight basis, the perlite and cellulose fiber combined forming at least 25% of the weight of the core. The paper facer being laminated to the core with a water-based adhesive applied across substantially the full area of the facer, both the compressive strength of the perlite and tensile strength of the cellulose fiber being utilized by operation of the binder such that a relatively high nail-pull capacity in comparison to the weight of the composite board is achieved and sag resistance is imparted to the composite board when it is used for ceiling tile.

US Patent:

7703243, Apr 27, 2010

Filed:

Feb 13, 2006

Appl. No.:

11/352729

Inventors:

Mirza A. Baig - Lindenhurst IL, US

Assignee:

USG Interiors, Inc. - Chicago IL

International Classification:

E04B 1/82
E04B 2/00

US Classification:

52144, 5250601, 5250606, 4282947, 4282921

Abstract:

A ceiling tile of gypsum and cellulose fibers formed into a board by initially mixing the fibers and gypsum in a water-based slurry that is felted and thereafter pressed and dried with a desired board thickness, the dried board being processed to form a plurality of holes in a face thereof through at least the majority of the thickness of the board, the collective volume of the holes being sufficient to reduce the weight of the board by at least 10% and increase the NRC exhibited by the board over that which would otherwise be found in a board of the same composition without such holes.

US Patent:

7732043, Jun 8, 2010

Filed:

Sep 15, 2005

Appl. No.:

11/227014

Inventors:

Mirza A. Baig - Lindenhurst IL, US
William A. Schmitt - Duluth MN, US

Assignee:

USG Interiors, Inc. - Chicago IL

International Classification:

D04H 1/00
B32B 5/16
D21H 11/00

US Classification:

4282921, 428323, 162135

Abstract:

A ceiling tile product and method in which a slurry formed mat primarily comprising mineral wool and binder is provided with a binder enhancement zone at its face. The binder enhancement zone can reduce the total required latex content, reduce the amount of finish or paint needed to achieve a commercially acceptable color and improve noise reduction.

US Patent:

8133354, Mar 13, 2012

Filed:

Jan 4, 2008

Appl. No.:

11/969316

Inventors:

Mirza A. Baig - Lindenhurst IL, US

Assignee:

USG Interiors, LLC. - Chicago IL

International Classification:

D21H 17/28
D21H 17/33
D21H 17/63
D21H 23/04
E04B 1/84

US Classification:

1621813, 162158, 1621641, 162175, 1621818, 162185, 181284, 181294

Abstract:

A composition and process suitable for making acoustic tiles are disclosed. Certain embodiments of the composition comprise: perlite; inorganic material selected from the group consisting of calcium sulfate, calcium carbonate, clay and mixtures thereof; a binder selected from the group consisting of starch, a combination of starch and cellulosic fibers, latex, kraft paper gel and mixtures thereof; optionally mineral wool; optionally gypsum; and cellulosic fiber, wherein at least a portion of the cellulosic fiber and at least a portion of the inorganic material are pulp and paper processing waste comprising cellulosic fiber, clay and calcium carbonate. Certain embodiments of the process comprise: forming an aqueous slurry; continuously flowing slurry onto a moving foraminous wire to form a cake; dewatering the cake to form a base mat; and drying the base mat.

US Patent:

8147629, Apr 3, 2012

Filed:

May 16, 2008

Appl. No.:

12/121831

Inventors:

Mirza A. Baig - Lindenhurst IL, US

Assignee:

USG Interiors, LLC - Chicago IL

International Classification:

B29C 65/00
B32B 29/00
B32B 37/00
B32B 3/24
E04B 2/00
E04F 13/00
B28B 1/48
B29D 19/08

US Classification:

156 45, 156 46, 156 71, 264154

Abstract:

A ceiling tile of gypsum and cellulose fibers formed into a board by initially mixing the fibers and gypsum in a water-based slurry that is felted and thereafter pressed and dried with a desired board thickness, the dried board being processed to form a plurality of holes in a face thereof through at least the majority of the thickness of the board, the collective volume of the holes being sufficient to reduce the weight of the board by at least 10% and increase the NRC exhibited by the board over that which would otherwise be found in a board of the same composition without such holes.

US Patent:

8182922, May 22, 2012

Filed:

Aug 24, 2005

Appl. No.:

11/210585

Inventors:

Mirza A. Baig - Lindenhurst IL, US
John J. Polyner - Esko MN, US
Terry Couch - Cloquet MN, US

Assignee:

USG Interiors, LLC - Chicago IL

International Classification:

B32B 9/04

US Classification:

428454

Abstract:

An improved economically produced clean room ceiling tile formed as a composite comprising a base board and a finish coated paper facer laminated to the base board. The base board is preferably made with excess thickness and is machined to a desired caliper. The machined board is sealed with a clay coating and thereafter coated with a water-based adhesive. The paper facer is laminated to the board with the water-based adhesive and is finish coated with a water-based wet scrubbable coating. The paper facer is easy to laminate, exhibits excellent coverage of surface defects in the base board surface, is fully compatible with the water-based finish coating, and contributes to the sag resistance of the tile.

US Patent:

20070102237, May 10, 2007

Filed:

Nov 4, 2005

Appl. No.:

11/267125

Inventors:

Mirza Baig - Lindenhurst IL, US

Assignee:

USG Interiors, Inc. - Chicago IL

International Classification:

E04B 1/82
E04B 1/84

US Classification:

181290000, 181286000, 181294000

Abstract:

Low density acoustical gypsum boards having a perforated cover sheet that have good sound absorption properties and are generally clear of falling gypsum dust. The invention optionally provides a cover sheet having a pattern producing a textured visual effect particularly when viewed from a distance. The acoustical gypsum boards can be produced on modified existing gypsum board lines.