Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 8043594 | Systems and methods for generating sulfuric acid Methods and systems for generating sulfuric acid are disclosed. In some embodiments, the method includes combusting a sulfur-containing material with a gas including oxygen to produce a first stream of sulfur dioxide, mixing water with the first stream of sulfur dio... | 10/25/2011 |
| 7238331 | Process for producing nano-powders and powders of nano-particle loose aggregate The present invention discloses a process for producing nano-powders and powders of nano-particle loose aggregate, which includes: (a) providing at least two reactant solutions A and B capable of rapidly reacting to form deposits; (b) supplying the at least two reac... | 07/03/2007 |
| 7097819 | Method for producing calcium carbonate Calcium carbonate in the form of aragonite crystals suitable for use as a filler for papermaking to give useful properties for bulk, whiteness, opacity, wire abrasion and yield is obtained by taking advantage of the causticization step. Herein disclosed is a process... | 08/29/2006 |
| 7018464 | Body pigment and process for preparing the same A body pigment with a good skin feel for cosmetics is provided which has an appropriate crumbling property and combines slipping property and adhesiveness without compromising oil absorption. The body pigment is comprised of a metal-containing compound and has a str... | 03/28/2006 |
| 6991677 | Titanium dioxide-calcium carbonate composite particles Titanium dioxide-calcium carbonate composite particles capable of realizing characteristic properties inherent in titanium dioxide such as a high opacity, a process for producing the same, and a complex composition or complex incorporated with the same are provided.... | 01/31/2006 |
| 6306494 | Fine particulate synthetic chalcoalumite compounds, process for their production, and heat insulator and agricultural film containing the fine particulate synthetic chalcoalumite compounds Novel, fine particulate synthetic chalcoalumite, process for preparation thereof, and a heat insulating agent and agricultural film containing said fine, particulate synthetic chalcoalumite. The above objects are met by synthetic chalcoalumite represented... | 10/23/2001 |
| 6228249 | Electrolytic purification of calcium carbonate The present invention provides an electrochemical process for reducing metal contaminants in calcium carbonate by solubilizing the metal contaminate in an aqueous solution of calcium carbonate and then removing the solubilized metal contaminant by passing... | 05/08/2001 |
| 6159436 | Conversion process for strontium sulfate in carbonate rich celestite ores to strontium carbonate using sodium carbonate in an air/vapor-lift loop reactor This invention relates to a low energy hydrometallurgical process for the production of strontium carbonate of chemical and glass grade from carbonate rich celestite ores typically having around 28% combined strontianite, calcite, dolomite and other carbo... | 12/12/2000 |
| 6132696 | Manufacture of precipitated calcium carbonate of improved color and stable crystalline form A method for the manufacture of precipitated calcium carbonate from impure calcium oxide of improved color is disclosed. The method comprises admixing impure calcium oxide with an aqueous solution consisting essentially of a salt of at least one compound ... | 10/17/2000 |
| 5939036 | Manufacture of precipitated calcium carbonate A method for the manufacture of precipitated calcium carbonate from impure calcium oxide of improved colour is disclosed. The method comprises admixing impure calcium oxide with an aqueous solution consisting essentially of a salt of at least one compound... | 08/17/1999 |
| 5861133 | Synthetic chalcoalumite compounds and process for producing thereof A synthetic chalcoalumite compound represented by the formula (1) (Zna-x2+ Mx2+)Al43+ (OH)b (An-)c.mH.sub.2 O (1) wherein M2+... | 01/19/1999 |
| 5853686 | Calcium carbonates of altered crystal habit or morphology and methods for producing same Methods are disclosed in which first and second reactant salts and, optionally, a complexing agent are added to a non-aqueous reaction solvent to form a reaction system. The reactant salts, which are substantially soluble and reactive with each other in w... | 12/29/1998 |
| 5750086 | Process for producing ultrafine particles of colloidal calcium carbonate A process for producing ultrafine particles of colloidal calcium carbonate which comprises the steps of adding magnesium sulfate into an aqueous suspension of calcium hydroxide, carbonating the aqueous suspension by introducing carbon dioxide into the aqu... | 05/12/1998 |
| 5705140 | Process for the transformation of halogenated refrigerant gases The high temperature combustion of hydrogen and oxygen is used to transform halogenated refrigerant gases (HRGs) and halons to produce calcium fluoride salts. Calcium carbonate is also produced by a series of chemical processes. Calcium chloride is partia... | 01/06/1998 |
| 5407655 | Process for the removal and the recovery of ammonia from liquid waste A process for the removal and recovery of ammonia from liquid waste, characterized essentially by the following operations: reacting the liquid waste with pure carbon dioxide, or with a gaseous mixture rich in carbon dioxide, or with at least one carbonate, to... | 04/18/1995 |
| 5362457 | Direct synthesis of anion substituted hydrotalcite A method for producing an anion intercalated hydrotalcite without first forming hydrotalcite and then having to activate the hydrotalcite prior to substituting anions in the hydrotalcite structure. The method includes reacting an activated magnesia with a... | 11/08/1994 |
| 5275797 | Method of producing barium carbonate A method is disclosed for producing barium carbonate by adding barium sulfate to coal tar pitch maintained at a temperature of about 350° C. to about 450° C., and thereafter heating the reactants to a temperature between 700° C. to 950° C. in a second... | 01/04/1994 |
| 5240692 | Basic magnesium carbonate and process for preparation thereof Disclosed is a novel basic magnesium carbonate represented by the following general formula: nMgCO3.Mg(OH)2.mH.sub.2 O wherein n is a number of from 3 to 5 and m is a number of from 3 to 5, which consists of porous particles composed of an agg... | 08/31/1993 |
| 5207997 | Process for producing an inorganic barium-containing solids composition The processing of leaching residues from barium sulfide leaching is described. Sodium sulfide as well as a solid which is useful as an additive for fired clay products, particularly bricks, are obtained as valuable reaction products.... | 05/04/1993 |
| 5164171 | Removal of carbonate from caustic sulfide solution In the manufacture of ammonium paratungstate, sulfide is added to a tungsten-containing solution in order to precipitate molybdenum sulfide. Volatiles, including sulfides, evolved during this process are collected in a caustic scrubbing solution. The sulf... | 11/17/1992 |
| 4720375 | Process for producing magnesium oxide High purity magnesium oxide is obtained from a magnesite-containing ore, the impurities of which include calcium compounds. The ore is first calcined and the resulting magnesium oxide is converted to magnesium chloride by leaching with an ammonium chlorid... | 01/19/1988 |
| 4666688 | Method for recovery and conversion of strontium sulfate to strontium carbonate from low and medium grade celestite ores Essentially pure strontium carbonate is recovered from low to medium grade strontium sulfate containing ores by first treating the ore with a hydrochloric acid solution to remove extraneous materials including calcium, magnesium, barium, and iron. The rem... | 05/19/1987 |
| 4559214 | Particulate calcium carbonate The invention provides particulate calcium carbonate having incorporated therein from 0.1 to 10% by weight, based on the weight of calcium carbonate, of polymaleic acid or a water-soluble salt thereof.... | 12/17/1985 |
| 4508690 | Method of producing very pure magnesium oxide Very pure magnesium oxide is obtained from ore containing magnesium, more particularly ore containing magnesium carbonate, by calcining the ore and leaching the resulting magnesium oxide with carbon dioxide and calcium chloride solution to produce magnesi... | 04/02/1985 |
| 4402993 | Process for coating optical fibers Vitreous optical fibers provided with hermetically sealed coatings applied by method and apparatus comprising; drawing a fiber directly from a fiber extruder into and through an elongated chamber having inert gas air locks at its opposite ends. Between th... | 09/06/1983 |
| 4335083 | Method for leaching magnesium from magnesium hydroxide-containing composition A method for leaching magnesium from a magnesium hydroxide-containing composition, especially a mineral, which comprises contacting said composition with an aqueous solution of an ammonium salt whose corresponding magnesium salt is soluble in said aqueous... | 06/15/1982 |
| 4279661 | Mineral filler, method of preparation and use thereof Mineral filler such as calcium carbonate, having at most 15% by weight of particles which are smaller than 0.2 μm with a corresponding spherical diameter, method of preparation, and use thereof are provided.... | 07/21/1981 |
| 4272341 | Process for recovery of metal values from lead-zinc ores, even those having a high carbonate content A chemical, electro-chemical process for recovering meta values from a zinc- or lead-containing material comprises: in a solubilization stage, oxidizing the zinc- or lead-containing material by treating said material with a ferric chloride leach solution; when... | 06/09/1981 |
| 4235852 | Process for treating an exhaust gas containing nitrogen oxides and sulfur oxides A process is described for treating an exhaust gas containing NOx and SOx in which NOx and SOx are effectively converted into industrially useful products of NH3, or sulfur by use of an aqueous absorb... | 11/25/1980 |
| 4226635 | Extended BaCO3 for brick scum prevention This invention relates to an improved barium carbonate prepared by precipitating barium carbonate on an inert core to effectively increase its sulfate scavenging utility by providing enhanced reactivity and dispersibility. This invention is especially use... | 10/07/1980 |
| 4201759 | Method for regenerating calcium sulfoxy compounds produced in the combustion of carbonaceous fuels in fluidized beds In methods for combusting carbonaceous sulfur-containing fuels in a fluidized bed wherein the fluidized bed contains at least one calcium compound selected from the group consisting of calcium oxide, calcium hydroxide, calcium carbonate and calcium bicarb... | 05/06/1980 |
| 4201754 | Method for the conversion of calcium sulfoxy compounds into calcium carbonate compounds in sulfur oxide treatment processes A method for converting calcium sulfoxy compounds selected from the group consisting of CaSOx and Ca(HSOx)2 and their hydrates wherein x is 3 or 4 into calcium carbonate, the method consisting essentially of; converting th... | 05/06/1980 |
| 4164554 | Method for converting calcium sulfoxy compounds into calcium carbonate compounds A method for converting calcium sulfoxy compounds selected from the group consisting of CaSOx and Ca(HSOx)2 where x is 3 or 4, into calcium carbonate by a method consisting essentially of: (a) converting the Ca(HSOx | 08/14/1979 |
| 4100264 | Process for the preparation of calcium carbonate for use in fluorescent lamp phosphors A method of producing finely-divided phosphor grade calcium carbonate having a calcite crystalline structure and a very low sodium content. The calcium carbonate is produced from calcium chloride having a high sodium impurity content, such as calcium chlo... | 07/11/1978 |
| 4061715 | Process for conversion of alkaline earth sulfites and bisulfites into oxides and carbonates There is disclosed a process for converting an alkaline earth metal sulfite or bisulfite selected from the group consisting of the sulfites or bisulfites of calcium and magnesium into an oxide form by reaction with hydrogen and water vapor at elevated tem... | 12/06/1977 |
| 4060588 | Process for removing sulfur-containing gases from waste gases Sulfur-containing compounds, particularly sulfur dioxide, are removed from stack gas streams by wet scrubbing the gases wherein an alkaline earth metal sulfate and/or sulfite are formed. Example processes are lime/limestone and Double Alkali scrubbing pro... | 11/29/1977 |
| 3966431 | Waste stone oxidation and recarbonization The disclosed process provides for the production of a desulfurized fuel gas from a sulfur-containing fuel oil by absorption, in a first reaction zone, of the sulfur contaminants with a calcium oxide-containing material, which material is then further tre... | 06/29/1976 |
