Celebrity Inventors
Lawrence Welk, the bandleader who entertained millions of Americans over a generation of broadcasting his TV show, once received a patent: for a music-themed design of an ashtray.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 4386016 | Preparation of porous, pure silica dioxide and of chromium-oxide-on-silica dioxide catalysts A process is provided for the preparation of an improved porous silicon dioxide catalyst support, wherein a silicon dioxide prepared by flame hydrolysis is converted into an aqueous gel and thereafter admixed with at least 15 vol. % of a C1 to ... | 05/31/1983 |
| 4384086 | Large pore volume olefin polymerization catalysts Large pore volume (ࣙ1.4 cc/g) silica is obtained by slowly drying an acidic (pH ࣘ3.5) silica hydrogel. The gel is useful in connection with chromium as an ethylene polymerization catalyst.... | 05/17/1983 |
| 4382070 | Process for producing xerogel of silicic acid with high volume of pores The product of this invention can be applied as a column packing for high performance liquid chromatography. This material is further useful as a catalyst carrier, as a sorbent for selective concentrating diluted compounds for analytical purposes, and for... | 05/03/1983 |
| 4339559 | Polymerization using silica from single phase controlled hydrolysis of silicate ester A method comprising combining a silicate ester and water under hydrolysis conditions in the presence of a sufficient amount of solvent that the reaction mixture remains as a single phase, adding sufficient acid neutralizing agent to form a gel and separat... | 07/13/1982 |
| 4327065 | Method of preparing silica aerogel Silica aerogel in the form of a substantially crack-free, preferably transparent block is described, together with a method for the preparation of such aerogel and use thereof in solar panels. The preparation is effected by means of hydrolysis of a tetraa... | 04/27/1982 |
| 4324576 | Method for producing optical glass A method for producing optical glass, which comprises charging a mixed solution capable of forming a high-silica-content gel by hydrolysis reaction into a vessel, the inner wall face of which is composed of a material unwettable to the mixed solution, suc... | 04/13/1982 |
| 4323381 | Method for producing mother rods for optical fibers A process for producing a mother rod useful for the production of an optical fiber which comprises hydrolyzing a silicon alkoxide to prepare a gel of a desired shape, and drying and sintering the gel to produce a block made of a silica glass. The process ... | 04/06/1982 |
| 4303641 | Hydrous silica gel containing dentifrice Dentifrice compositions containing a hydrous silica gel having a water content of from about 20 to about 60 weight percent are disclosed. The abrasiveness of the gel is increased by contacting the gel with an alkaline medium to provide a gel pH of about 6... | 12/01/1981 |
| 4301034 | Silica from single phase controlled hydrolysis of silicate ester A method comprising combining a silicate ester and water under hydrolysis conditions in the presence of a sufficient amount of solvent that the reaction mixture remains as a single phase, adding sufficient acid neutralizing agent to form a gel and separat... | 11/17/1981 |
| 4299731 | Large pore volume olefin polymerization catalysts Large pore volume (ࣙ1.4 cc/g) silica is obtained by slowly drying an acidic (pHࣘ3.5) silica hydrogel. The gel is useful in connection with chromium as an ethylene polymerization catalyst.... | 11/10/1981 |
| 4279879 | Silica gel Silica hydrogel is prepared by electrolysis of an aqueous anolyte solution containing an alkali metal silicate and a salt of a non-siliceous anion, such as sodium nitrate or sodium sulfate, in a cell with a cation permselective membrane separating the ano... | 07/21/1981 |
| 4264564 | Process for the manufacture of high purity silicic acid A process is herein described for the manufacture of high purity, granular silicic acid from aqueous alkali metal silicate solutions by acidification thereof, freezing and subsequently thawing the reaction mixture, and filtering, washing and drying the in... | 04/28/1981 |
| 4256682 | Method of preparing silica gel pellets Silica gel pellets are prepared by mixing finely divided silica gel with an aqueous ammoniacal medium, compressing the mixture into pellets, and drying the pellets.... | 03/17/1981 |
| 4255286 | Process of preparing spherical microparticles A process of preparing spherical microparticles having size of from 0.5 to 1000 μm and designed as chromatographic column charge, catalyst vehicle and absorption filling, or the like, by polymerizing a monomeric or polymeric substance in a macromolecular... | 03/10/1981 |
| 4230679 | Poly(silicic acid) Particulate, porous, water-insoluble amorphous poly(silicic acid) which is characterized by an average pore diameter of at least 100 A and a surface area of 500 to 850 m2 /g, by an average pore diameter of 50 A to about 300 A and a surface area... | 10/28/1980 |
| 4228261 | Supported chromium-oxide polymerization catalyst having a porous silica support used in the polymerization of olefines Process for the preparation of a porous, pure silica which is particularly suitable as a catalyst support for a chromium-oxide catalyst used in polymerizing of olefins. The process comprises the steps of converting a silicon-halogen compound to a silica a... | 10/14/1980 |
| 4228260 | Supported chromium-oxide polymerization catalyst having a porous silica support used in the polymerization of olefins Process for the preparation of a porous, pure silica which is particularly suitable as a catalyst support for a chromium-oxide catalyst used in polymerizing of olefins. The process comprises the steps of converting a silicon-halogen compound to a silica a... | 10/14/1980 |
| 4216113 | Process for preparing thickening grade of silica and process of using same This invention consists in the exchanging of the water of a silica hydrogel with a water miscible organic solvent to a water content of less than 10 percent by weight, and then feeding this organogel to a fluid energy mill for concurrent drying and deaggl... | 08/05/1980 |
| 4206297 | Polymerization catalysts and methods A polymerization catalyst and method which produces substantially pure silica that is uncontaminated with alkali metal or alkaline earth metal ions before associating with the resulting support silica the chromium compound which is either a chromium oxide... | 06/03/1980 |
| 4190457 | Preparation of inorganic xerogels An inorganic xerogel is produced by contacting an inorganic hydrogel with a contacting system which comprises at least one organosilicon compound and thereafter heating the resulting hydrogel to remove essentially all the liquid components therein.... | 02/26/1980 |
| 4169926 | Inorganic hydrogels and uses thereof Inorganic hydrogels, e.g., silica-containing hydrogels, are contacted with contacting agents comprising oxygen-containing organic compounds and then dried to remove the liquid components therefrom. The contacting agent can also be an oxygen-containing org... | 10/02/1979 |
| 4152503 | Catalyst support prepared by alcohol treatment of hydrogels A method is provided for treating a hydrogel with a saturated, aliphatic alcohol selected from the group consisting of 1-pentanol, 2-pentanol, 3-methyl-1-butanol, 4-methyl-2-pentanol, 2,2-dimethyl-1-propanol and 1-hexanol to remove water thereby producing... | 05/01/1979 |
| 4150101 | Process for the production of silica with an aerogel type structure Aerogel like silica is prepared having: A BET surface area between 80-450 m2 /g; A bulk density between 10-60 g/l; A DBP number between 2.4-3.8; An average particle size range of 0.1-7 μm; A most frequent particle size range of 1-2 μm; A pH value in a 4% aq... | 04/17/1979 |
| 4148864 | Silica gel of improved properties and process of making same A silica gel of improved hardness and abrasion resistance, increased adsorption power, and other valuable properties is produced by a highly economic process. A useful manufacturing system for making such silica gel and a simple apparatus for producing si... | 04/10/1979 |
| 4148867 | Production of synthetic fluorspar In the production of a synthetic fluorspar of low silicon dioxide content wherein hexafluosilicic acid is added in an amount ranging from slightly below up to about stoichiometric amount to an aqueous calcium carbonate suspension at a temperature from abo... | 04/10/1979 |
| 4147605 | Method of producing sols by electrodialysis A method of producing a sol of an element selected from the group consisting silicon, aluminum, antimony, chromium, manganese, molybdenum, tin and tungsten comprising electrodialytically transferring alkali metal cations of an aqueous solution of a water ... | 04/03/1979 |
| 4124471 | Controlling silica sol particle size A novel method of controlling electrodialytically produced silica sol particle size and concentration comprising effecting electrodialysis of an alkali metal silicate anolyte in an electrodialysis cell with a cation permselective membrane separating the a... | 11/07/1978 |
| 4104363 | Method for preparation of perfectly spherical particles of silicagel with controlled size and controlled pore dimensions The invention relates to a method for preparation of perfectly spherical particles of silicagel with controlled particle size and controlled pore diameter, which are suitable as packings for high-speed liquid chromatography and gel permeation chromatograp... | 08/01/1978 |
| 4090887 | Pigmented microporous silica microspheres produced by a water in oil emulsion Pigmented silica microspheres having an average diameter from 2 μm to 100 μm and consisting essentially of from 10% to 70% by weight of particulate pigment, dispersed throughout a microporous silica matrix and, optionally, containing a coating of dense ... | 05/23/1978 |
| 4089932 | Process for the production of spherical silica gel A process for the production of spherical silica gel which comprises emulsifying water glass in a dispersion medium composed of a polar solvent and a non-polar solvent and gelling the water glass while maintaining it in emulsified state.... | 05/16/1978 |
| 4078043 | Process for preparing calcium fluoride from hexafluoro silicic acid and production of silicic acid gel or active silicic acid from said calcium fluoride Disclosed is a process for the preparation of calcium fluoride comprising reacting hexafluoro silicic acid with calcium carbonate in the presence of sulfate or aluminum ions within a pH range of between about 2 and 6 and separating the calcium fluoride pr... | 03/07/1978 |
| 4076651 | Agglomerated siliceous bodies Agglomerated siliceous bodies exhibiting superior mechanical properties are disclosed, as well as the process therefor. Shaped articles of superior mechanical strength are produced by carefully controlled partial desiccation of silica hydrogel particles f... | 02/28/1978 |
| 4053565 | Silica xerogels Silica xerogels having pore volumes greater than about 2.0 cc/g., the major portion of which volumes are provided by pores having pore diameters ranging from 300 to 600 A, and surface areas ranging from 200 to 500 m2 /g. Xerogels having such cu... | 10/11/1977 |
| 4049781 | Method of preparing loosely aggregated 200-500 millimicron silica A loosely aggregated 200-500 millimicron primary particle size silica can be produced by a silicate neutralization technique. The process consists of neutralizing an alkali metal silicate solution by addition to an ammoniated acetic acid or carbonic acid ... | 09/20/1977 |
| 4036933 | Highly-active, finely divided super-dry silicon dioxide A highly active superdry silica aerogel free of adsorbed water and hydrogen-bonded silanol groups the infrared spectrum of which is characterized by a single narrow intense band at about 3700 cm.sup.-1 within the range between 4000 and 2000 cm | 07/19/1977 |
| 4037042 | Manufacture of olefin polymers A process for the manufacture of olefin polymers by polymerization of -monoolefins by means of a silicic acid xerogel/chromium trioxide catalyst, which is obtained by a method wherein (1) a finely divided silicic acid xerogel is first manufactured ... | 07/19/1977 |
| 4011096 | Vesiculated silica microspheres Vesiculated silica microspheres having an average diameter from 0.5μ to 50μ, a maximum vesicle diameter less than 50μ and a volume of vesicles from 5 to 95% of the total volume of the microspheres, produced by acidifying an oil-in-water-in-oil emulsion... | 03/08/1977 |
| 4006175 | Porous silicic acid and its production Porous silicic acid having a specific surface of about 50 to 1000 m2 /g and having an anion content below the chemically determinable limit of detection is made by hydrolyzing methyl or ethyl silicate or polymethyl or polyethyl silicate with ab... | 02/01/1977 |
| 3996338 | Silica xerogel An improved silica xerogel comprises a particular type of porous silica xerogel which has been treated with steam under particular temperature conditions.... | 12/07/1976 |
| 3977993 | Metal oxide aerogels Novel metal oxide aerogels, particularly silica aerogels, having a combination of both a large surface area and a large pore volume are provided. Such aerogels have a surface area of at least 300 square meters per gram and a pore volume of at least 2 mill... | 08/31/1976 |
