Class 252/378P - Perlite

Subclass of Class 252 - Compositions
No. of patents: 41
Last issue date: 06/29/2004

Number	Title	Issue Date
6756426	Lightweight composite material for protective pads, cushions, supports or the like and method An improved material for use in resilient conforming pads, cushions, impact resistance padding and the like is described. The material comprises a liquid or semi-solid matrix phase and an expanded Perlite included phase. The material is useful for providing low weig...	06/29/2004
6712898	Perlite products with controlled particle size distribution Expanded perlite products having controlled particle size distribution, methods of producing the expanded perlite products, and methods of use thereof are provided. The expanded perlite product has, for example, a low ratio of standard deviation of particle size dis...	03/30/2004
6464770	Perlite products with controlled particle size distribution Expanded perlite products having controlled particle size distribution, methods of producing the expanded perlite products, and methods of use thereof are provided. The expanded perlite product has, for example, a low ratio of standard deviation of partic...	10/15/2002
6379454	Finishing mortar for sound-absorbing coating of inner walls, ceilings and the like in buildings The invention relates to a finishing mortar for sound-absorbing coating of inner walls, ceilings and the like in buildings. It may be applied directly on concrete or some other carrying material or on underlying insulation material, such as mineral wool. ...	04/30/2002
5911818	Acoustical tile composition A composition suitable for making acoustical tiles in a water-felting process comprises expanded perlite, clay, a binder component selected from the group consisting of starch, latex, cellulosic fiber and mixtures thereof and optionally mineral wool. The ...	06/15/1999
5542976	Refractory imitation fireplace objects A blend for producing refractory imitation fireplace objects comprises between 30% and 50% amorphous aluminum siliceous mineral silicate, between 1% and 5% fibre and between 40% and 60% high temperature cement. A method of producing a slurry for casting t...	08/06/1996
5336318	Clay-free, asbestos-free and glass microbubble-free drying type joint compounds A clay-free, asbestos-free and glass microbubble-free, drying type Joint compound containing an in-situ or associative thickener as a substitute for asbestos and any clay substitute therefor. In particular, these drying type joint compounds contain no att...	08/09/1994
5294255	Pumpable backfill grout A pumpable backfill grout which hardens into a controlled low strength material and an additive for making up such a backfill grout. The grout consists essentially of portland cement, a smooth surfaced vesicular expanded perlite, fly ash, fine aggregate, ...	03/15/1994
5160710	Apparatus for continuous production of intumesced particles Apparatus for continuous production of intumesced, expanded, puffed, or exfoliated particles. A rotatable processing table is driven by a speed controllable motor connected to rotate the table at a desired rotational rate. Particulate feeding means overli...	11/03/1992
5116537	Low temperature expandable vermiculite and intumescent sheet material containing same A method of decreasing the expansion temperature and improving the expansion characteristics of vermiculite ore comprising subjecting vermiculite ore containing interlamellar cations to a potassium nitrate solution for a time interval sufficient to ion-ex...	05/26/1992
5114617	High strength structural perlite concrete A high strength concrete particularly useful for precast, prestressed products comprising by weight of the wet concrete mix, 8 to 60 percent cement, 0.5 to 20 percent smooth-surfaced, vesicular, expanded perlite, 5 to 30 percent water, 0 to 12 percent poz...	05/19/1992
5002696	Expanded mineral particles and apparatus and method of production A non-porous, substantially hollow, expanded mineral product, such as expanded perlite, is produced by uniformly and indirectly heating ore for about 1 to 30 seconds in an expansion chamber maintained at about 1400° F.-2100° F. to produce uncoated parti...	03/26/1991
4931211	Process of expanding obsidian Obsidian having less than one percent of combined water is expanded to a volume many times the original by a two stage heating process carried out in at least one refractory-lined, rotary kiln. It is heated gradually by a first flame to a temperature of 1...	06/05/1990
4889747	Hydrophobic expanded perlite compositions and process for preparing the same Expanded perlite compositions containing thereon, therein or thereon and therein buffered aqueous silane emulsion compositions as well as hydrophobic expanded perlite compositions as described above but from which residual water has been removed are provi...	12/26/1989
4830797	Process for the production of closed gas-cellular granular materials A closed gas-cell cellular material is formed by heat treating a hydrosilicate, especially perlite, at a low temperature and then in the form of grains of a grain size of 5 to 8000 micrometers, feeding these grains through a space at a temperature of 800�...	05/16/1989
4721582	Toxic gas absorbent and processes for making same Solid sorbents (acceptors) for noxious components, e.g. SOx, NOx and HX, from gases below about 250°, specifically acceptors that contain hydrated divalent metal oxide coated onto an exfoliated or expanded mineral support, are impro...	01/26/1988
4693924	Decorative tile A decorative tile having a front face with a design thereon varies in density so that the front face of the tile presents a solid appearance, but the overall weight of the tile is less than for a comparable conventional plaster tile. The tile of the inven...	09/15/1987
4687694	Decorative tile A gypsum plaster and chopped glass fiber tile having increased insulation values, reduced weight and reduced density due to the presence of vermiculite and perlite....	08/18/1987
4664623	Process and apparatus for the thermal treatment of trickling material swellable or rendered swellable, and containing aluminosilicates In the thermal process for treating swellable granulates of clay or the like, the granulates are entered in heaps (4) with free intervals between them into a shaft (1) and traverse said shaft (1) by stages from top to bottom. The heaps (4) are supported b...	05/12/1987
4629508	Process for forming hydrated calcium silicate products A process is described for the formation of shaped hydrated calcium silicate products. The process comprises reacting an aqueous slurry containing a source of calcium hydroxide, perlite as a source of silica, and a soluble calcium salt in the presence of ...	12/16/1986
4592722	Process and apparatus for forming lightweight inorganic aggregate A method and apparatus for expanding particles of a lightweight aggregate material are disclosed. The apparatus comprises a housing having an upper chamber separated from a lower chamber by a partition having a plurality of openings. Hot air is introduced...	06/03/1986
4559719	Method for processing matter in a turbulent mass of particulate material For processing matter in a turbulent mass of particulate material, a substantially annular processing region (14; 104; 206) is provided and is preferably in the form of a substantially annular processing chamber having a radially inner wall which includes...	12/24/1985
4525388	Process for expanding and coating perlite Expanded perlite is produced while simultaneously or substantially simultaneously coating the expanded perlite with an hydrophobic coating material by passing the expanded perlite and heated expander exhaust gases from the expansion chamber through a cool...	06/25/1985
4521182	Method and apparatus for heating particulate material Particulate material is heated by directing a flame downwardly along the central axis of a vertically disposed furnace. The particulate material is introduced at a number of locations distributed radially around the flame at the upper end of the furnace. ...	06/04/1985
4520073	Pressure coating of mineral fillers Mineral filler materials are provided with improved hydrophobic coatings by pressure coating of porous minerals using steam as a carrier for the coating material. Thereby more complete sealing of fissures and cracks in the porous filler materials' surface...	05/28/1985
4454267	Lightweight joint compound A lightweight joint compound for use in finishing joints between gypsum wallboards, comprising a filler, a binder, a specially treated expanded perlite, a non-leveling agent, and a thickener....	06/12/1984
4401586	Process for thermally expanding silicate-based material by an infrared heat source Silicate-based composition particles are rapidly and completely expanded to form an expanded, cellular particulate aggregate of maximum density in short periods of time at particle temperatures which are comparatively low, that is, 100° C., compared to e...	08/30/1983
4347155	Energy efficient perlite expansion process A thermally efficient process for the expansion of perlite ore is described. The inlet port and burner of a perlite expansion chamber (preferably a vertical expander) are enclosed such that no ambient air can enter the chamber. Air and fuel are metered to...	08/31/1982
4342554	Production of expanded clay and shale In a process and apparatus for producing an expanded particulate product in a rotary tubular kiln presenting an essentially linear product conveying and treating region free of lateral offset, in which a burner at the discharge end of the kiln operates to...	08/03/1982
4318691	Furnace for expanding mineral ores A high temperature furnace adapted to expand mineral ores such as vermiculite, perlite and the like. The furnace preferably includes an upright, vertically oriented frame adapted to support an elongated furnace tube into which mineral ore is delivered for...	03/09/1982
4304704	Thermal insulating material A thermal insulating material which includes silicone coated perlite providing thermal insulation, powdered perlite to fill in the gaps between the silicone coated perlite particle, and a specially formulated binder for the perlite. The binder has a powde...	12/08/1981
4290749	Perlite expansion process and apparatus therefor A process and apparatus therefor are described for the expansion of perlite utilizing vaporized heavy liquid fuel as at least half, and preferably all, of the combustion fuel. In this process preheated air is used to vaporize the liquid fuel, which has pr...	09/22/1981
4255489	Perlite filler Expanded perlite is coated with polysiloxane, the coating dried, and subsequently strengthened by heating to form an attrition-resistant, non-porous, particulate filler suitable for inclusion in polymeric materials to reduce their bulk density....	03/10/1981
4233379	Separator for starved electrolyte lead/acid battery Compositions and papers made therefrom useful as separator materials in starved electrolyte lead/acid batteries are described. The compositions comprise a mixture of 30% to 80% by weight of perlite and 20% to 70% by weight of glass fibers. The glass fiber...	11/11/1980
4183980	Perlite filler coated with polydimethylsiloxane Expanded perlite is coated with polysiloxane, the coating dried, and subsequently strengthened by heating to form an attrition-resistant, non-porous, particulate filler suitable for inclusion in polymeric materials to reduce their bulk density....	01/15/1980
4179264	Method for expanding perlite Particulate unexpanded perlite is introduced to an expansion apparatus that utilizes the combustion of a gas as a source of heat. The particulate perlite is mixed with a combustible gas, air from a first source and oxygen and thereafter introduced to a bu...	12/18/1979
4175158	Agglomerating particulate perlite Particulate perlite fines are agglomerated to increase the apparent particle size by forming a mixture of the perlite fines with a compound such as boric acid capable of being substantially converted to B2 O3 at elevated temperatures...	11/20/1979
4148941	Process for dust reduction treatment of expanded perlite The dust fraction of expanded perlite is bonded to the larger sized grains by spraying finely atomized paraffin at a temperature of less than 130° C. upon the perlite which has been cooled to a temperature of less than 130° C. In a second embodiment of ...	04/10/1979
4034704	Substrate support for vacuum coating installation The support is rotated by a central drive shaft extending into a vacuum chamber in sealed relation thereto, with the central drive shaft having support arms secured thereto and each carrying a respective support head, each support head having several subs...	07/12/1977
3985935	Alkali resistant perlite - CaO vitreous fibers Alkali resistant glass fibers and mineral wool are produced from perlite by heating perlite ores until the melt viscosity is under 15 poise and impinging a stream of the melt with a gas at from 80 to 100 psig to produce the fibers....	10/12/1976

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Class 252/378P - Perlite