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...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 6375735 | Precipitated silicas, silica gels with and free of deposited carbon from caustic biomass ash solutions and processes Disclosed are amorphous precipitated silicas, silica gels, and amorphous carbons derived from biomass and methods of producing them with and without adhered or deposited amorphous carbons produced by acidifying a caustic silicate solution produced by caus... | 04/23/2002 |
| 6365649 | Fused spherical silica, method for producing same and liquid sealing resin composition The present invention relates to a fused spherical silica having a maximum particle size of 45 μm, an average particle size of 2 to 10 μm, and a ratio of a specific surface area Sw1 of the particles to a theoretical specific surface area S | 04/02/2002 |
| 6365269 | Plastic compositions for sheathing a metal or semiconductor body The adhesion of plastic to metal surfaces is improved by adding a specific filler in the sheathing material. The filler is formed of spherical SiO2 particles with a graduated diameter distribution defining individual diameter stages wherein the... | 04/02/2002 |
| 6364919 | Process for preparing metal oxide slurries suitable for the chemical mechanical polishing of semiconductors Disclosed is a process for preparing metal oxide slurries suitable for the chemical mechanical polishing (CMP) of semiconductor devices. A suspension of metal oxide in water is dispersed at a predetermined pressure through an orifice of a dispersion chamb... | 04/02/2002 |
| 6352679 | Ultrafine particle silicon dioxide and process for producing the same An ultrafine particle silicon dioxide which comprises silicon dioxide powders in the range of ultrafine particles having a BET specific surface area of 350 m2 /g or more and has a ratio of BET/CTAB specific surface areas of 0.6 to 1.1, a number... | 03/05/2002 |
| 6348428 | High-purity crystalline inorganic fiber, molded body thereof, and method of production thereof A crystalline inorganic fiber or molded body thereof is thermally treated in gas atmosphere containing chlorine. The crystalline inorganic fiber or molded body thereof contains small impurities such as Fe, Cu and Ni. For example, Fe is 15 ppm or less, Cu ... | 02/19/2002 |
| 6338743 | Buffer solutions for suspensions used in chemical-mechanical polishing The present invention relates to buffer systems in the form of solutions or salts for preparing suspensions which can be used for chemomechanical polishing. In particular, these buffer systems can be used for preparing suspensions having a high pH of 9.5-... | 01/15/2002 |
| 6335396 | Precipitated silica Silicas in the form of powder and substantially spherical beads or granules are characterized by a CTAB specific surface of 140 and 240 m2 /g a high ultrasonic disaggregation factor, an average diameter, which is small after ultrasonic disaggre... | 01/01/2002 |
| 6334880 | Abrasive media and aqueous slurries for chemical mechanical polishing and planarization Non-spherical silica particles having nodular morphology for use as an abrasive media in chemical mechanical polishing are disclosed. Also disclosed are aqueous slurries of monodispersed non-spherical nodular shaped particles having mean effective diamete... | 01/01/2002 |
| 6333013 | Method for producing an ultra fine silica powder A method for producing an ultra fine silica powder, which comprises subjecting a raw material mixture containing a silica powder, a reducing agent comprising a metal silicon powder and/or a carbon powder, and water, to heat treatment at a high temperature... | 12/25/2001 |
| 6329062 | Dielectric layer including silicalite crystals and binder and method for producing same for microelectronic circuits A two-component porous material including small silicalite crystals in a porous binder provides a low dielectric constant material useful as an insulating layer in microelectronic devices. The silicalite/binder porous material uses silicalite nanocrystals... | 12/11/2001 |
| 6328944 | Doped, pyrogenically prepared oxides Doped, pyrogenically prepared oxides of metals and/or non-metals which are doped with one or more doping components in an amount of 0.00001 to 20 wt. %. The doping component may be a metal and/or non-metal or an oxide and/or a salt of a metal and/or a non... | 12/11/2001 |
| 6319427 | Fast luminescent silicon There are provided mesoporous silica materials containing in their pores stabilized clusters of silicon atoms, of size 2 nanometers or less, and capable of photoluminescence to emit fast photons. They are prepared by chemical vapour deposition of silicon ... | 11/20/2001 |
| 6319486 | Control of morphology of mesoporous aluminosilicate or pure-silica molecular sieves by effect of alcohol The present invention relates to a method for synthesizing mesoporous aluminosilicate or pure-silica molecular sieves with newly hierarchical morphologies by adding suitable amount of alcohol. There are hollow sphere, hollow sphere with a pillar in it and... | 11/20/2001 |
| 6302926 | Preparations of monodisperse spherical oxide particles The invention relates to preparations of monodisperse spherical oxide particles in the form of free-flowing powders of agglomerates in which the particles are bonded to one another by a binder. With these preparations, the oxide particles can be homogeneo... | 10/16/2001 |
| 6299855 | Stable synthetic material and method for preparing same A composition of matter is provided including an inorganic porous material having wall portions defining mesopore-sized channels having a mean diameter of between about 15 Å and about 100 Å and a narrow diameter distribution of less than or equal to abo... | 10/09/2001 |
| 6296826 | Method for the preparation of vitrified silica particles An efficient method is proposed for the utilization of heretofore useless extremely fine fluffy silica particles obtained as a flue dust in the flame-hydrolysis of vaporizable silicon compound in an oxyhydrogen flame in the manufacturing process of fused ... | 10/02/2001 |
| 6290933 | High cleaning dentifrice A high cleaning low abrasion dentifrice containing a silica hydrogel having a mean particle size from about 5 to about 11 microns; an Einlehner hardness of from 1 to about 20; an oil absorption of about 40 to less about 100 cc/g, a BET surface area from 1... | 09/18/2001 |
| 6290924 | Precipitated silica beads Essentially spherical precipitated silica beads, well adapted for the reinforcement of elastomeric matrices, have a mean particle size of at least 80 μm, a BET specific surface area ranging from 60 to 130 m2 /g, a fill density in packed state ... | 09/18/2001 |
| 6281277 | Homogeneously surface-fluorinated metal oxide particulates, process for manufacturing the same, and use of the same The present invention provides homogeneously surface-fluorinated metal oxide particulates, characterized in that a metal oxide particulate such as Ti, Al, Si, Ag, Cu, Fe, Zr, Ce, Mn, Sn, Ge and Ta is surface reacted with fluorine gas while allowing the me... | 08/28/2001 |
| 6277349 | Tridymite-based processing for high purity quartz A process of purifying crystalline quartz to remove impurities within the lattice structure comprising the steps of heating the quartz to the tridymite polymorphic form and evaporatively reacting the heated quartz with an aqueous acid solution reactive wi... | 08/21/2001 |
| 6270743 | Method of manufacturing crystalline microporous materials A method of manufacturing crystalline microporous material suitable for manufacturing a variety of crystalline microporous material under mild reaction conditions and under safe working environmental conditions by using simple installation. The crystallin... | 08/07/2001 |
| 6268424 | Precipitated silicic acid Precipitated silica having the following parameters: BET surface area 80-180 m2 /g CTAB surface area 80-139 m2 /g BET/CTAB ratio 1.0-1.6 Sears No. (consumption of 5-25 ml ... | 07/31/2001 |
| 6264907 | Process for producing silica particles suitable for use as filler for paper The present invention relates to a process for easily and efficiently producing silica particles having a narrow particle size distribution and a high porosity from inexpensive starting materials such as sodium silicate. The silica particles of the presen... | 07/24/2001 |
| 6248683 | Process for the regeneration of used silica gel The present invention is concerned a process for the regeneration of the spent silica gel used in chromatography and for any other kind of silica. The process comprises 5 main steps, namely: washing with an extractant of organic compounds and removing volatile... | 06/19/2001 |
| 6248302 | Process for treating red mud to recover metal values therefrom A method for processing red mud to recover iron, aluminum, silicon and titanium metal values therefrom the method comprising the steps of adding the red mud to a digester containing an acid to provide a mixture of acid and red mud and heating the mixture ... | 06/19/2001 |
| 6248144 | Process for producing polishing composition A process for producing a polishing composition, which comprises preliminarily adjusting water to pH 2-4, adding from 40 to 60 wt % of fumed silica to the water under high shearing force, adding water to lower the viscosity to 2-10000 cps, stirring the mi... | 06/19/2001 |
| 6235258 | High surface area silica solid A non-crystalline silica solid is obtainable by a process comprising the step of contacting in a liquid medium at least one silica precursor with at least one template comprising a polyethyleneimine or a mixture of two or more thereof.... | 05/22/2001 |
| 6221149 | Process for the preparation of precipitated silica, new precipitated silicas containing aluminium and their use for the reinforcement of elastomers The invention relates to a new process for the preparation of precipitated silica which has a very good dispersibility and very satisfactory reinforcing properties. It also relates to new precipitated silicas which are in the form of powder, of substantia... | 04/24/2001 |
| 6221326 | Method for preparing hollow silica particles A method for preparing hollow particles comprising a dense silica shell, by precipitating active silica from an aqueous alkaline metal silicate on a core constituted in a material other than silica and by eliminating the material without destroying the si... | 04/24/2001 |
| 6217840 | Production of fumed silica A method for producing fumed silica and a fluorine-containing product from a source of silica in solid form and a solid material containing fluorine, the solid material selected from the group consisting of sodium aluminum tetrafluoride, cryolite, aluminu... | 04/17/2001 |
| 6207610 | Compacts based on pyrogenically produced silicon dioxide Compacts based on pyrogenically produced silicon dioxide and having the following physical and chemical characteristics: Outer diameter 0.8-20 mm BET surface area 30-400 m2 /g Pore volume ... | 03/27/2001 |
| 6191122 | Partially hydrophobic precipitated silicas A partially hydrophobic precipitated silica having a methanol wettability of 10 to 49%, in particular with a DBP uptake on a dry basis of greater than 250 g/100 g and a mean particle size of 1 to 12 μm and/or a carbon content of 0.3 to 1.85% and/or a los... | 02/20/2001 |
| 6187292 | Silica capable of being used in toothpaste compositions The invention discloses an abrasive precipitation silica useable in toothpaste compositions, said silica having a BET specific surface ranging from 15 to 300 m2 /g, a DOP oil absorption ranging from 40 to 160 ml/g, a median particle diameter of... | 02/13/2001 |
| 6180077 | Process for purification of SiO2 granulate A process for the purification of SiO2 granulate is provided, where the SiO2 granulate is supplied into a reaction zone, heated therein and exposed to a treatment gas which comprises a halogen-containing component. The treatment gas ... | 01/30/2001 |
| 6180076 | Readily dispersible precipitated silica Precipitated silica, having the following physico-chemical parameters: BET surface area 120-300 m2 /g CTAB surface area 100-300 m2 /g BET/CTAB ratio 0.8-1.3 Sear... | 01/30/2001 |
| 6174512 | Silica mesoporous body and process for preparing same A method of producing a mesoporous silica material, including reacting, with stirring, a liquid mixture containing a tetraalkyl orthosilicate, a linear alkylamine, an inorganic acid and water, and drying and thermally treating the thus obtained solid prod... | 01/16/2001 |
| 6171384 | High surface area silicate pigment and method An amorphous silicate pigment having a pore volume of at least about 4.0 ml/g as measured by mercury intrusion, a BET surface area of at least about 300 m2 /g, and an Al2 O3 content of about 2.0-10.0 wt % is provided. The ... | 01/09/2001 |
| 6171699 | Spheroidal silica particulates useful as reinforcing fillers for elastomers Essentially spherical silica-based granular particulates, whether having a mean particle size of at least 300 μm and a density of from 0.15 to 0.32, or a mean particle size of from 80 μm to 400 μm and a density of at least 0.32, are well adapted as rei... | 01/09/2001 |
| 6168773 | Rapid process for making silica gel and silicate polymer and low density gels made thereby This invention relates to a rapid process for the preparation of a silica gel or a silicate polymer comprising contacting at least one fluoroalkoxysilane with a solution comprising water, optionally in the presence of a solvent and/or a catalyst. Low dens... | 01/02/2001 |
