Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 6616744 | Method of forming inorganic pigments The present invention provides a method of forming inorganic pigments using one or more metal alloys. Metal alloys used in the method of the invention are preferably milled to a mean particle size of less than about 10 microns, may be mixed with other met... | 09/09/2003 |
| 6482387 | Processes for preparing mixed metal oxide powders Described are preferred polymerized organic-inorganic processes for producing mixed metal oxide powders suitable for use in the ceramics and related industries. The preferred processes employ a non-chelating polymer such as polyvinyl alcohol or polyalkyle... | 11/19/2002 |
| 6017500 | High purity lithium salts and lithium salt solutions The present invention provides an inexpensive process for the preparation of lithium salts of formula LiX having a desired or required level of purity using lithium chloride and lithium sulfate. In the process of the invention, a lithium salt selected fro... | 01/25/2000 |
| 5571489 | Process for chromium recovery from aqueous solutions A process for recovery of chromium in an aqueous solution comprising converting the chromium to chromyl chloride, separating the chromyl chloride from the aqueous solution, either as a heavy underlayer, or by extraction into a solvent, purifying the chrom... | 11/05/1996 |
| 5482690 | Low-residue high-extraction production of sodium dichromate The invention relates to a process for the low-waste production of sodium dichromate from the mineral chromite with simultaneous recovery of low-carbon ferrochromium.... | 01/09/1996 |
| 5393503 | Process for making chromic acid Disclosed is an improvement on a process in which sodium chromate is reacted with sulfuric acid to produce sodium bichromate and sodium sulfate, and the sodium bichromate is reacted with sulfuric acid to produce chromic acid and sodium bisulfate. In the i... | 02/28/1995 |
| 5279804 | Vanadium removal in aqueous streams Disclosed is a method of removing soluble vanadium from an aqueous stream containing sodium chromate or sodium bichromate. The liquor is passed over a water-insoluble trivalent chromium compound, and the vanadium in the liquor is extracted from the liquor... | 01/18/1994 |
| 5250274 | Process for the production of sodium dichromate The invention relates to a process for the production of sodium dichromate and sodium dichromate solutions by oxidative roasting of chrome ores under alkaline conditions, leaching of the furnace clinker obtained with water or an aqueous chromate-containin... | 10/05/1993 |
| 4968503 | Process for the production of sodium dichromate A process for the production of sodium dichromate comprising reacting sodium chromate with acids, the acids being sulfuric acid and NaHSO4 formed as a waste product in the production of CrO3 and thus being contaminated with chromium ... | 11/06/1990 |
| 4773974 | Production of hexavalent chromium for use in chlorate cells By-product hypochlorite from the electrolytic production of chlorates, notably sodium chlorate, is used to form hexavalent chromium for use in the electrolysis process by oxidation of trivalent chromium compounds by the hypochlorite. The hypochlorite may ... | 09/27/1988 |
| 4759922 | Anhydrous sodium dichromate in flakes; process and apparatus for its preparation on an industrial scale A new anhydrous sodium dichromate in flakes, Na2 Cr2 O7, m.p. 356° C. (dec. 400° C.) is described, characterized in that it comes in flakes with an area of approx. 1 cm2, thickness 0.5 mm and apparent specific... | 07/26/1988 |
| 4704259 | Removal of chromium from cell liquor Soluble hexavalent chromium values are removed from aqueous chlorate solutions by employing a critical effective ratio of OH- :Cr2 O7= ions of at least 3:1 in the aqueous chlorate solution and by employing a di... | 11/03/1987 |
| 4108596 | Recovery of chromium values from waste streams by the use of alkaline magnesium compounds A process and a product formed thereby for the recovery of chromium values from aqueous solutions (e.g., waste liquors) comprises contacting an acidic solution containing sulfate ion and trivalent chromium ion with at least about 4 molar equivalents of Mg... | 08/22/1978 |
| 4086319 | Recovery of chromium from tannery waste A process is disclosed for incinerating tannery waste solids containing organic material and chromium which comprises burning at least one ton per day of said waste in the combustion zone of an industrial furnace at a low temperature, preferably between a... | 04/25/1978 |
| 3981973 | Crystal growth in the presence of finely divided polytetrafluoroethylene Metal salts which are crystallizable from a saturated aqueous solution of the salt in the presence of a dispersion of polytetrafluoroethylene (hereinafter referred to as PTFE) resin are grown as geometrically better defined and larger crystals than those ... | 09/21/1976 |
| 3933972 | Process for preparing pure sodium bichromate Processes for preparing vanadium- and chlorine-free sodium bichromate which comprises concentration of a sodium chromate liquor so as to cause formation of crystals of neutral sodium chromate tetrahydrate, separation of these crystals from their mother li... | 01/20/1976 |
| 3932598 | Process for producing alkali metal chromates and dichromates An improved process for producing alkali metal chromates and dichromates wherein ferrochrome alloy containing at least 1% carbon by weight is reacted with a molten mixture of an alkali metal nitrate and an alkali metal carbonate at a temperature of at lea... | 01/13/1976 |
