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| Number | Title | Issue Date |
| 6808793 | Pre-coated mat-faced gypsum board A moisture-tolerant structural panel comprising a gypsum board comprising a set gypsum core sandwiched between and faced with mats of glass fibers, wherein a free surface of one of said mats is coated with a combination of a mineral pigment, an inorganic adhesive bi... | 10/26/2004 |
| 6770354 | Mat-faced gypsum board A moisture-tolerant structural panel comprising a gypsum board comprising a set gypsum core sandwiched between and faced with mats of glass fibers, wherein a free surface of one of said mats is coated with a combination of a mineral pigment, an inorganic adhesive bi... | 08/03/2004 |
| 6746781 | Gypsum board having polyvinyl alcohol binder in interface layer and method for making the same Paper and/or mat-faced gypsum board is prepared by applying a relatively thin coating of aqueous gypsum slurry containing a polyvinyl alcohol binder to one or two facer sheets. The polyvinyl alcohol binder provides adequate adhesion between the set gypsum core and t... | 06/08/2004 |
| 6648965 | Fire door components and fire doors comprising the components Structural components for a fire door comprising a core and edge banding and other structural components, the components comprising gypsum, expanded perlite, and cement, and having a density between about 60 and 80 lbs./ft.3. Also, a method by ... | 11/18/2003 |
| 6340389 | Fire door core The present invention describes improved fire door cores and improved methods of making these fire door cores. The fire door core of the present invention comprises expanded perlite, a fireproof binder, fire clay or vermiculite, and optionally one or more... | 01/22/2002 |
| 6001496 | Mat-faced gypsum board and method of manufacturing same Disclosed is a mat-faced gypsum board of the general type having a gypsum-based core formed from a gypsum slurry compressed through an extrusion ratio of at least about 3:1 wherein the fibrous mat facing on at least one side of the board has a weight per ... | 12/14/1999 |
| 5981406 | Glass mat with reinforcing binder In a gypsum board faced with a fibrous mat, for example, a mat of glass filaments adhesively bound together, improvements are realized by the use of a reinforcing binder in the mat.... | 11/09/1999 |
| 5945208 | Fire-resistant gypsum building materials Fiberboards are provided containing at least about 65 wt. % calcium sulfate dihydrate derived from hemihydrate or anhydrous gypsum, and at least about 7 wt. % pulped paper fibers. The boards are capable of being formed into structural members having super... | 08/31/1999 |
| 5945182 | Fire-resistant members containing gypsum fiberboard Fire-resistant structures are provided having at least a 20 minute ASTM E-152 fire test rating. The structures include glass partition walls having framing members formed from a gypsum-containing composition having a density of at least about 60 lbs/ft | 08/31/1999 |
| 5883024 | Fibrous mat and mat-faced gypsum board Disclosed are fibrous mat-faced gypsum boards with improved resistance to skin irritation and itching. The boards include a mat facing in which the fibrous portion thereof comprises both inorganic and organic fibers, with organic fibers preferably being p... | 03/16/1999 |
| 5723226 | Gypsum-containing compositions and fire-resistant articles A fire resistant article comprising at least about 65 wt. % gypsum dihydrate, reinforcing fibers disposed substantially homogeneously throughout said set gypsum dihydrate, inorganic binder, and optionally refractive filler. This composition provides super... | 03/03/1998 |
