| Patent Number |
Title Of Patent |
Date Issued |
| RE29753 |
Asbestos-free joint compounds |
September 5, 1978 |
| A joint compound which is preferably asbestos-free, for use in finishing joints between wallboards, comprising a filler, a binder, and any two or all three of a water-holding agent; a slip-inducing colloid; and a non-swelling clay having sufficient pseudoplasticity to render the comp |
| D572565 |
Handle for taping knife with enlarged hammer end |
July 8, 2008 |
|
| D566143 |
Mixer for viscous materials |
April 8, 2008 |
|
| D565921 |
Offset handle for taping knife |
April 8, 2008 |
|
| D565383 |
Contoured handle for taping knife |
April 1, 2008 |
|
| D557102 |
Handle for taping knife with enlarged hammer end |
December 11, 2007 |
|
| D553941 |
Offset handle for taping knife |
October 30, 2007 |
|
| D553940 |
Handle for taping knife with enlarged hammer end |
October 30, 2007 |
|
| D553939 |
Offset handle for taping knife |
October 30, 2007 |
|
| D551053 |
Contoured handle for taping knife |
September 18, 2007 |
|
| D549070 |
Offset handle for taping knife |
August 21, 2007 |
|
| D541617 |
Handle for taping knife with enlarged hammer end |
May 1, 2007 |
|
| D541616 |
Contoured handle for taping knife |
May 1, 2007 |
|
| D292319 |
Sliding glass door |
October 13, 1987 |
|
| D292318 |
Sliding glass door |
October 13, 1987 |
|
| D292317 |
Sliding glass door |
October 13, 1987 |
|
| D260555 |
Decorative window panel for doors |
September 1, 1981 |
|
| D260439 |
Decorative window panel for doors |
August 25, 1981 |
|
| D260438 |
Decorative window panel for doors |
August 25, 1981 |
|
| D250774 |
Universal joining section for lawn and garden edging |
January 9, 1979 |
|
| 7413603 |
Fiberboard with improved water resistance |
August 19, 2008 |
| Articles, including fiberboard, are made from a pumpable, flowable slurry including alpha-calcined calcium sulfate hemihydrate anchored in pores of host particles, alpha-calcined calcium sulfate hemihydrate, a silicone compound, magnesium oxide, and water. The magnesium oxide catalyzes t |
| 7381261 |
Expanded perlite annealing process |
June 3, 2008 |
| This invention is directed to a method of reducing the water demand of expanded perlite that includes obtaining a vibrating screen supported at an angle and placing expanded perlite on the vibrating screen. The expanded perlite is moved over the screen past toward a burner at a rate |
| 7374611 |
Sprayable machinable media |
May 20, 2008 |
| In conjunction with water, a mixture can be used to prepare a sprayable slurry that hydrates to form a machinable plaster composition. The mixture includes from about 80% to about 98% by weight calcium sulfate hemihydrate, from about 1% to about 5% by weight adhesive binder for adher |
| 7364676 |
Slurry spreader for cementitious board production |
April 29, 2008 |
| The invention provides a board forming system comprising a forming table comprising a belt with a surface for conveying a backing layer; a mixer fitted with a mechanism capable of depositing cementitious slurry material over a top surface of the backing layer; and a slurry spreader p |
| 7364015 |
Acoustical panel comprising interlocking matrix of set gypsum and method for making same |
April 29, 2008 |
| An acoustical panel comprising a continuous phase of an interlocking set gypsum matrix and a method of preparing an acoustical panel are disclosed. |
| 7347895 |
Flexible hydraulic compositions |
March 25, 2008 |
| A composition for making flexible articles includes a hydraulic component of at least 50 weight % fly ash, a water-soluble, film-forming polymer and water. Articles are made from this composition by making a slurry of the components, forming the article and allowing it to set. |
| 7338990 |
High molecular weight additives for calcined gypsum and cementitious compositions |
March 4, 2008 |
| A mixture is used in conjunction with water is used for preparing a slurry that hydrates to form an exterior gypsum cement. The mixture includes 30-70% by weight hydraulic cement, 30-70% by weight calcined gypsum and 0.05-2.5% polycarboxylate. When the mixture is added to water less than |
| 7309516 |
Cellulose gypsum based substrate with increased water resistance and strength by surface applica |
December 18, 2007 |
| The disclosed invention consists of an improved gypsum based, cellulosic containing board and method for applying a resin to an untreated board at a spray station where pMDI resin is sprayed onto the front and back side of the board. A resin distribution system is used to supply the spra |
| 7296919 |
Slurry mixer constrictor valve |
November 20, 2007 |
| A method for providing a smoothly mixed slurry to a web is provided which includes inserting calcined gypsum and water into a mixer (12), agitating the contents of the mixer (12) to form an aqueous dispersion of the calcined gysum, and passing the agitated contents from an outlet (20) of |
| 7276549 |
Surface enhancing coating for gypsum-containing floor underlayments |
October 2, 2007 |
| A coating for preparing a floor underlayment to receive an adhesive includes a water-soluble, latex polymer, a defoamer and a dual-function surface enhancing agent. The surface enhancing agent includes a set accelerator that also functions to cross link the adhesive, hardening the su |
| 7273579 |
Process for production of gypsum/fiber board |
September 25, 2007 |
| An improved process calcining a gypsum/cellulosic fiber slurry to produce a composite gypsum/cellulosic fiber product resides in adding a selected crystal modifier to the gypsum/cellulosic fiber slurry prior to the heating step to reduce the time necessary to carry out the calcination |
| 7244304 |
Gypsum-containing board and tile, and method for producing same |
July 17, 2007 |
| A method for producing a set gypsum-containing product comprising an interlocking matrix of set gypsum wherein said method comprises applying to said set gypsum one or more enhancing materials selected from the group consisting of phosphoric acid; condensed phosphoric acids, each of |
| 7182589 |
Embedment device for fiber-enhanced slurry |
February 27, 2007 |
| An embedment device for use in a structural panel production line wherein a slurry is transported on a moving carrier relative to a support frame, and chopped fibers are deposited upon the slurry, includes a first elongate shaft secured to the support frame and having a first plurality |
| 7175426 |
High efficiency refractoryless kettle |
February 13, 2007 |
| An apparatus for calcining gypsum including a housing having a bottom wall, open top, and a plurality of side walls extending therebetween. A fixture is located adjacent the open top for receiving gypsum from a source and transferring the gypsum into the housing. At least one burner |
| 7154282 |
System and method for calibrating moisture meters with associated settable slurry products for d |
December 26, 2006 |
| A method is provided for calibrating a moisture meter to a particular settable slurry product for determining the relative dryness of the product. The steps of the method include determining the appropriate relative dryness of the particular slurry product, associating a moisture met |
| 7121713 |
Swinging agitator for a gypsum calcining apparatus and the like |
October 17, 2006 |
| An agitation mechanism for a gypsum processing apparatus which includes a housing having a bottom wall, and at least one side wall. The housing can be constructed and arranged to receive and process gypsum-based products. An agitator frame having a similarly shaped cross-section to the |
| 7056964 |
High strength flooring compositions |
June 6, 2006 |
| A composition is disclosed for a mixture to be used in conjunction with water for preparing a slurry that hydrates to form a high strength flooring compound. The mixture includes from about 50% to about 98% by weight calcium sulfate hemihydrate, having at least 25% of the calcium sul |
| 7056460 |
Application of methylenediphenyldiisocyanate for producing gypsum/wood fiber board |
June 6, 2006 |
| A process for making an improved gypsum/wood fiber board is described. Products resulting from the process are also described. The process comprises adding a diisocyanate, specifically methylenediphenyldiisocyanate (MDI) to an aqueous slurry of calcium sulfate material and cellulosic |
| 7007914 |
Slurry mixer constrictor valve |
March 7, 2006 |
| An apparatus and method for controlling the flow of a slurry is provided which includes using a constrictor valve on a mixing and dispensing apparatus. The constrictor valve includes a first guide plate and a second guide plate that are spaced a distance apart along the length of the |
| 6986812 |
Slurry feed apparatus for fiber-reinforced structural cementitious panel production |
January 17, 2006 |
| A feed apparatus for use in depositing a slurry upon a moving web having a direction of travel includes a main metering roll, a companion roll disposed in closely spaced relation to the metering roll to form a nip therebetween. The nip is constructed and arranged to retain a supply of |
| 6951586 |
Spray apparatus |
October 4, 2005 |
| The disclosed invention consists of an improved gypsum based, cellulosic containing board and method for applying a resin to an untreated board at a spray station where pMDI resin is sprayed onto the front and back side of the board. A resin distribution system is used to supply the spra |
| 6893752 |
Mold-resistant gypsum panel and method of making same |
May 17, 2005 |
| A mold-resistant gypsum panel includes a core of an interlocking matrix of calcium sulfate dihydrate crystals, a facing material on at least one side of the panel and a salt of pyrithione dispersed through both the core and the facing materials. A method of making a mold-resistant gypsum |
| 6874930 |
Slurry mixer outlet |
April 5, 2005 |
| An apparatus configured for connection to a mixer for receiving a slurry and altering the flow characteristics of the slurry includes a conduit having a main inlet in slurry receiving communication with the mixer outlet and extending to a spout for discharging the slurry, at least one |
| 6869474 |
Very fast setting cementitious composition |
March 22, 2005 |
| Extremely fast setting of cementitious compositions for producing cement-based products such as cement boards is made possible by adding an alkanolamine to a hydraulic cement such as portland cement, and forming a slurry with water under conditions that provide an initial slurry temp |
| 6822033 |
Compositions and methods for treating set gypsum |
November 23, 2004 |
| A composition and method for treating a set gypsum-containing material are disclosed. The composition is formed from at least water at least one trimetaphosphate salt, at least one monobasic phosphate salt, and at least one acyclic polyphosphate salt having at least three phosphate units |
| 6815049 |
Gypsum-containing composition having enhanced resistance to permanent deformation |
November 9, 2004 |
| A composition including, but not limited to, a mixture of a calcium sulfate material, water, and a tetrametaphosphate compound is disclosed. Desirably, the inclusion of the tetrametaphosphate compound (e.g., salt or ion) in a pre-set treatment of a calcium sulfate material enhances the |
| 6805741 |
Ready-mixed setting-type composition and related kit |
October 19, 2004 |
| A ready-mixed composition, which sets when mixed with an activator for the reaction of calcined gypsum with water to form set gypsum, is disclosed. The composition comprises water and calcined gypsum in a weight ratio of water to calcined gypsum of from about 0.15 to about 0.5, as well a |
| 6800131 |
Gypsum-containing board and tile, and method for producing gypsum-containing board and tile |
October 5, 2004 |
| The invention provides a set gypsum-containing product having increased resistance to permanent deformation and a method for preparing it comprising forming a mixture of a calcium sulfate material, water, and an appropriate amount of one or more enhancing materials chosen from conden |
| 6752895 |
Water spray for smooth surface gypsum fiberboard panels |
June 22, 2004 |
| An improved method and apparatus for imparting a smooth surface to gypsum fiber panels. The method involves imparting energy to the surface of a slurry as the slurry is dewatered just prior to rehydration. The apparatus used to impart the energy is a water spray including a source of |
| 6740395 |
Substrate smoothed by coating with gypsum-containing composition and method of making |
May 25, 2004 |
| A rough-surfaced substrate, such as a fiberboard, is provided with a smoother surface by applying a coating comprising calcium sulfate hemihydrate which has been prevented from hydrating to gypsum by set preventer, and which sets when brought into contact with a set initiator, e.g. a |
