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 |
| 4400175 | Process and an apparatus for the crystallization of melts with a simultaneous crushing operation The product which is present in the form of a melt is cooled and thereby crystallized in a double-shaft worm machine which has self-cleaning worm shafts rotating in the same direction. The crystallizing material is continually crushed in a repeatedly cutt... | 08/23/1983 |
| 4394364 | Separation of boric acid from mixtures thereof with sulphuric acid The present invention relates to a process for the separation of boric acid from boric acid-containing sulphuric acid in which the concentration of the sulphuric acid is adjusted such that the boric acid precipitates therefrom.... | 07/19/1983 |
| 4380532 | Process for fine purification of sulphur hexafluoride from impurities The present invention relates to the production of high-purity substances and, more specifically, to a process for a fine purification of sulphur hexafluoride from impurities. The process for a fine purification of sulphur hexafluoride comprises purificat... | 04/19/1983 |
| 4362560 | Process for producing high-purity gallium A process for producing high-purity gallium from gallium-arsenic containing wastes resulting from the manufacture of semiconductors which comprises a vacuum-thermal decomposition of said wastes under a residual pressure of from 1.10-1 to 1.10 | 12/07/1982 |
| 4341589 | Method for producing large surface plate or disc-shaped Si crystals with columnar structure Large surface silicon crystal layers with a columnar structure are produced by directing a plurality of spaced-apart cooling gas streams arranged relative to one another to correspond to a desired columnar structure and positioned a relatively short dista... | 07/27/1982 |
| 4340547 | Process for concentrating a flow of lipids in solvent A feed of lipid and solvent is concentrated in a chamber by establishing and maintaining within a chamber a net major flow and a separate and distinct net minor flow. A net transfer of solid phase lipid is effected from the major internal flow to the mino... | 07/20/1982 |
| 4312848 | Boron removal in silicon purification A method of removing boron impurity in a process for purifying silicon is disclosed wherein silicon is crystallized from a solvent metal. The method comprises the steps of providing a molten body containing silicon, the remainder aluminum and impurities a... | 01/26/1982 |
| 4312849 | Phosphorous removal in silicon purification A method of removing phosphorous impurity in a process for purifying silicon wherein silicon is crystallized from a solvent metal is disclosed. The method comprises the steps of providing a molten body containing silicon, the remainder aluminum and impuri... | 01/26/1982 |
| 4312847 | Silicon purification system A method for purifying silicon comprises the steps of providing a body of molten silicon-rich material and extracting heat therefrom to provide a solid phase containing silicon in crystal form and to concentrate impurities in a molten phase. After a desir... | 01/26/1982 |
| 4312846 | Method of silicon purification A method for purifying silicon comprises the steps of providing a body of molten silicon-rich material in a vessel having an upwardly removable first bottom therein and extracting heat therefrom to provide a solid phase containing silicon in crystal form ... | 01/26/1982 |
| 4305725 | Method of and apparatus for outgassing raw material used to grow crystals A method and apparatus for outgassing raw materials includes the steps of and means for heating the material to a temperature of about 800° C. and maintaining that temperature for a first bake out period during which the material is maintained at a press... | 12/15/1981 |
| 4304917 | Crystallization process In the crystallization of a material from a liquid solution thereof wherein normal rapid cooling produces a non-filterable solid, the mixture of material and liquid is subjected to a high shear force field to produce a filterable slurry of the material, w... | 12/08/1981 |
| 4295857 | Process for the crystalline precipitation of chromogens The invention contemplates a process for the crystalline precipitation of a chromogen from solution thereof in a solvent and within a capillary. The process involves first initiating a course of crystalline precipitation of the chromogen by initially and ... | 10/20/1981 |
| 4263010 | Control method and apparatus for crystallizer process control A control method and apparatus is provided for the on-line control of crystallizer apparatus and the like to maintain predetermined operating parameters including crystal size distribution and growth rate to achieve stable, predetermined optimum continuou... | 04/21/1981 |
| 4256717 | Silicon purification method A method for purifying silicon comprises the steps of providing a body of molten silicon-rich material and extracting heat therefrom to provide a solid phase containing silicon in crystal form and to concentrate impurities in a molten phase. After a desir... | 03/17/1981 |
| 4251502 | Modular chlorine dioxide generation systems A modular chlorine dioxide generating unit (10) is disclosed wherein recycled reaction mixture passes along a flow path (18) internally of the generator vessel (12) out of direct fluid flow communication with the reaction medium (13) from the lower end (1... | 02/17/1981 |
| 4246249 | Silicon purification process A method for purifying silicon comprises the steps of providing a body of molten silicon-rich material and extracting heat therefrom to provide a solid phase containing silicon in crystal form and to concentrate impurities in a molten phase. After a desir... | 01/20/1981 |
| 4245998 | Method and apparatus for crystallization of solution containing salts To remove salts from a solution containing the salts, hot air is injected downwards into the solution in a concentrator, and the solution is concentrated by direct contact with the hot air, thereby enhancing an evaporation efficiency in the concentrator a... | 01/20/1981 |
| 4231755 | Process for purifying solid substances A process for purifying solid substances by melting and subsequent resoliication, wherein a melted bath of the solid substance is formed, a roller is placed in the bath so that a first portion of its surface is in contact with the melted substance, and t... | 11/04/1980 |
| 4195067 | Process for the production of refined metallurgical silicon Silicon platelets essentially free of iron are precipitated from a solution of metallurgical grade silicon in molten aluminum and are melted in contact with silica slag to produce a refined metallurgical silicon (RMS). By directionally solidifying the ref... | 03/25/1980 |
| 4119744 | Method of manufacturing semiconductor devices in which a layer of semiconductor material is provided on a substrate A method of manufacturing semiconductor devices comprising a layer of semiconductor material, comprising the steps of providing a strip-shaped solid substrate having a main surface and providing a solid support having a substantially horizontal surface an... | 10/10/1978 |
| 4113552 | Elutriation leg and method The transfer of agitational forces from a main vessel to an elutriation leg connected thereto is effectively minimized with a slurry inlet and liquor outlet device mounted in the upper end of the elutriation leg. The device includes a slurry flow directin... | 09/12/1978 |
| 4094731 | Method of purifying silicon A process for producing crystalline silicon having an iron concentration less than about one-twentieth of the iron concentration of the mother liquor. Iron contaminated silicon is introduced into a mold and the mold walls are maintained at a temperature s... | 06/13/1978 |
| 4060118 | Recovering chloride flux salts for aluminum A method and apparatus for recovering flux salt and recycling or reusing the same in an aluminum refining method by introducing salt brine into a cylindrical evaporator with hot evaporator gas, rotating the evaporator to expose the brine to the hot gas an... | 11/29/1977 |
| 4056364 | Two stage continuous crystallization apparatus with controls A crystallizable solute is crystallized from a solution containing the same by introducing a solution of said solute into a first stage evaporative-crystallization zone together with seed solute crystals. Within the first stage evaporative-crystallization... | 11/01/1977 |
| 4051208 | Process for the conversion of liquid phases of non-metallic substances, especially polymerizable or crystallizable substances, into solid phases A system for the conversion of liquid phases of non-metallic substances into solid phases, especially polymerizable or crystallizable substances, provides a reaction chamber in the form of an upstanding substantially tubular-shaped hollow body, at the upp... | 09/27/1977 |
| 4045186 | Method for producing large soft hexagonal boron nitride particles Soft hexagonal boron nitride crystals of 200-600 microns platelet size are produced from crystals of less than fifty microns particle size by mixing the small crystals with Li3 N, simultaneously heating and pressurizing said mixture to a temper... | 08/30/1977 |
| 4039615 | Production of aluminum sulfate Hexagonal plate crystals of aluminum sulfate are produced in chemically pure form by a process which comprises cooling a heated saturated solution of chemically impure aluminum sulfate acidified with sulfuric acid to precipitate crystals of aluminum sulfa... | 08/02/1977 |
| 4011270 | Recrystallized menthol product and method of making A recrystallized menthol product derived from crude natural menthol is described for incorporation into foods, beverages and tobacco in amounts sufficient to create a lingering cool sensation in the mouth of the user of the food, beverage or tobacco with ... | 03/08/1977 |
| 3996018 | Crystallization system and method using crystal fracturing external to a crystallization column Crystals are grown in a column through which a supersaturated solution flows upwardly while large crystals having one dimension substantially greater than another dimension taken from the bottom of the column are fractured externally of the column and the... | 12/07/1976 |
| 3992159 | Process for purification by cryogenic sublimation A process is described for purifying liquids by cryogenic sublimation. This process involves solidifying the liquid by reducing the temperature and pressure to below the triple point. Purification is then carried out by direct transformation from the soli... | 11/16/1976 |
| 3988486 | Method for accelerating the crystallization and removal of tartar from a tartarous beverage A tartarous beverage, such as wine, containing a tartrate to be removed therefrom is conveyed from a storage container through a conduit under pressure into a first module having a semipermeable membrane. The semipermeable membrane forms two streams, a ta... | 10/26/1976 |
| 3976430 | Forced circulation cooling crystallizer A continuous integral forced circulation cooling crystallizer for the processing of fluids which comprises, in vertical disposition: A. an upper fluid holding chamber having an inlet and outlet for the fluid to be processed and having a partition means vertica... | 08/24/1976 |
| 3966445 | Freeze refining method An improved freeze refining method including the steps of collecting a heterogeneons material in crystalline form from a heated melt containing pure and impure materials and removing the collected crystals while maintaining the integrity of the crystals.... | 06/29/1976 |
| 3933990 | Synthesization method of ternary chalcogenides Large, strain free, single crystals of high optical quality selected from the IB-VB-VIB and IIIB-VB-VIB ternary chalcogenide groups, having a single stable solid phase from room temperature to the melting point of the crystal and vice-versa, are synthesiz... | 01/20/1976 |
