Salvatore C Immordino

6355099, Mar 12, 2002

Feb 11, 2000

09/502740

Salvatore C. Immordino - Trevor WI

United States Gypsum Company - Chicago IL

C04B 1100

106778, 106779, 106780, 106783, 264333, 427355, 427403, 427427

A plaster mixture for forming a machinable composition, includes calcium sulfate hemihydrate; an internal lubricating dispersable binder, and an adhesive binder for adhering the plaster mixture to a substrate. In the preferred embodiment, the composition includes calcium sulfate hemihydrate, a poly(ethylene glycol) internal binder, and an ethylene/vinyl acetate copolymer adhesive binder.

6379458, Apr 30, 2002

Feb 11, 2000

09/502609

Salvatore C. Immordino - Trevor WI
Therese Espinoza - Wood Dale IL
Richard B. Stevens - Crystal Lake IL
Charles J. Miller - McHenry IL

United States Gypsum Company - Chicago IL

C04B 1100

106772, 106783, 106785, 106786, 106819

A set accelerator for at least one of accelerating the hydration rate and reducing the set time of an aqueous slurry of calcium sulfate hemihydrate is described. The set accelerator consists of a mixture of ground calcium sulfate dihydrate and zinc sulfate material. Aluminum sulfate material is an optional component of the set accelerator. The set accelerator is particularly useful in accelerating the hydration rates of sprayable plasters. A fluid form of the set accelerator may be made by suspending the solids in water. The fluid form is advantageously used in ready mixed setting type joint compounds.

6398864, Jun 4, 2002

Nov 30, 1999

09/451576

Andrzej A. Przybysz - Chicago IL
Jeffrey F. Grussing - Trevor WI
Salvatore C. Immordino - Trevor WI

United States Gypsum Company - Libertyville IL

C04B 1100

106772, 106778

A plaster composition for making molds for reproduction by casting is disclosed. Calcium sulfate hemihydrate, potassium sulfate and potassium sodium tartrate are mixed together. The potassium sulfate and potassium sodium tartrate are in a ratio of from about 1:1 to about 10:1. Potassium sodium tartrate is present in an amount of from about 1 to about 10 pounds per ton of dry calcium sulfate hemihydrate, and the total of the potassium sulfate and potassium sodium tartrate is from about 2 to about 35 pounds per ton of calcium sulfate hemihydrate. Methods of making and using molds of this composition are also disclosed.

6406537, Jun 18, 2002

Nov 22, 2000

09/718279

Salvatore C. Immordino - Trevor WI

United States Gypsum Company - Libertyville IL

C04B 1106

106778, 106698, 106772, 106775, 106776, 106782, 106814

A composition comprising calcined gypsum, trimetaphosphate ion, and a water-soluble linear polymer formed by the addition reaction of ethylene oxide and/or alkoxy-substituted ethylene oxide with water, having enhanced strength when set and exhibiting high plasticity and workability such that it readily can be applied to a substrate, is disclosed.

6409823, Jun 25, 2002

Dec 28, 1999

09/473347

Michael Patrick Shake - Oak Lawn IL
Salvatore C. Immordino - Trevor WI
James R. Wittbold - Des Plaines IL

United States Gypsum Company - Chicago IL

C04B 1100

106772, 106819

An additive for accelerating the setting reaction of gypsum products is disclosed. It comprises a gypsum accelerator combined with a bisulfate salt. The gypsum accelerator is calcium sulfate dihydrate. The accelerator may optionally be ground with a sugar, a starch and/or boric acid. A process utilizing this additive combination is also disclosed. The bisulfate salt is most advantageously prewet with a portion of the calcium sulfate hemihydrate feed before being combined with the gypsum accelerator, water and the remaining portion of the calcium sulfate hemihydrate feed in the main mixer.

7516909, Apr 14, 2009

Feb 3, 2005

11/050309

James E. Messer - Westlake OH, US
Dennis Lettkeman - Watonga OK, US
Salvatore C. Immordino - Trevor WI, US
Timothy Ross - Kannapolis NC, US

United States Gypsum Company - Chicago IL

B05B 7/06

239432, 239422, 239433, 239428, 2394193

An apparatus for mixing an additive into a fluid to form a settable mixture includes a main fluid passageway having an inlet for receiving a supply of the fluid and an outlet for dispensing the fluid, the passageway having a longitudinal axis. The apparatus includes a control valve defining a portion of the main fluid passageway and configured for selectively controlling the flow of fluid in the passageway, an additive injector disposed in the passageway and having an emitter disposed in close relationship with the axis and oriented toward the outlet. A static mixer is disposed between the injector and the outlet for enhancing the uniform mixing of the additive and the fluid. Connection points between the inlet, the valve and the static mixer are configured for smooth transition of fluid and the prevention of at least one of the collection and premature setting of the mixture.

8323429, Dec 4, 2012

Jul 31, 2009

12/533774

Salvatore C. Immordino - Trevor WI, US
Lee K. Yeung - Vernon Hills IL, US

United States Gypsum Company - Chicago IL

B29C 65/00
B32B 13/00
B32B 37/00
B29C 47/00
B05D 1/36
B05D 5/00

156 39, 15624411, 427265

The present invention relates to a method for producing three-dimensional plaster objects via thin layer deposition. The inventive method comprises steps of depositing a layer of a calcium sulfate hemihydrate slurry onto the surface of a support in a predetermined pattern and activating the slurry with an activating agent so as to accelerate the setting reaction of calcium sulfate hemihydrate and water to form set calcium sulfate dihydrate. The depositing and activating steps can be repeated as necessary until the desired three-dimensional plaster object is formed.

20020117559, Aug 29, 2002

Jul 31, 2001

09/918940

Raymond Kaligian - Geneva IL, US
James Messer - Westlake OH, US
Dennis Lettkeman - Watonga OK, US
Salvatore Immordino - Trevor WI, US
Timothy Ross - Kannapolis NC, US

B05B007/12

239/413000, 239/432000

An apparatus for mixing an additive into a fluid to form a settable mixture includes a main fluid passageway having an inlet for receiving a supply of the fluid and an outlet for dispensing the fluid, the passageway having a longitudinal axis. The apparatus includes a control valve defining a portion of the main fluid passageway and configured for selectively controlling the flow of fluid in the passageway, an additive injector disposed in the passageway and having an emitter disposed in close relationship with the axis and oriented toward the outlet. A static mixer is disposed between the injector and the outlet for enhancing the uniform mixing of the additive and the fluid. Connection points between the inlet, the valve and the static mixer are configured for smooth transition of fluid and the prevention of at least one of the collection and premature setting of the mixture.