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 |
| 6068693 | Method for separating mixture of finely divided minerals and product thereof A method of enhancing the brightness and increasing the yield of a kaolin clay by optimizing the removal of the titania and mica impurities in the clay and the amount of clay remaining in the slurry is disclosed. The method is a selective flocculation pro... | 05/30/2000 |
| 5992641 | Methods and apparatus for screening particulate materials Improved methods of screening particulate matter are disclosed. For example, aqueous mineral slurries containing at least 10 weight percent of finely divided mineral solids are mechanically size separated using vibratory screening and a self propelled rec... | 11/30/1999 |
| 5913973 | Method for producing high solids aqueous acid-resistant calcium carbonate suspensions and product thereof A method for producing a high solids slurry of an acid-resistant precipitated calcium carbonate for shipping purposes is disclosed. A low solids of about 18 wt. % to 20 wt. % solids slurry is treated with a chemical additive, such as sodium aluminate, in ... | 06/22/1999 |
| 5856397 | Dry grinding aid for dry milling a calcined kaolin clay and a related method An improved method for dry milling calcined kaolin clays involves use of an effective amount of an ammonium polyacrylate dry grinding aid which is applied to a calcined kaolin clay product prior to dry milling. This improves flowability of the product thr... | 01/05/1999 |
| 5744530 | Granular calcium carbonate for use as a direct additive for thermoplastics A thermoplastic granule containing a high proportion of a particulate carbonate filler in a thermoplastic binder, for blending with an end product thermoplastic in which the carbonate filler is to be dispersed. The granule comprises at least 85% by weight... | 04/28/1998 |
| 5713998 | Method for producing high opacifying kaolin pigment An improvement is disclosed applicable to the method for producing a calcined kaolin by the steps of wet beneficiating a crude kaolin to form a slurry of the beneficiated kaolin; dewatering the slurry to form a substantially dry calciner feed; and calcini... | 02/03/1998 |
| 5711799 | Acid tolerant calcium carbonate composition and uses therefor An improved form of calcium carbonate which is acid tolerant to enable its use as a filler material in the making of neutral to weakly acid paper, and a process for producing this acid tolerant calcium carbonate are provided. This acid tolerant calcium ca... | 01/27/1998 |
| 5685900 | Method for beneficiating discolored kaolin to produce high brightness coating clay A method for beneficiating a low brightness fine particle size discolored kaolin crude to produce a high brightness coating clay. By combining the two beneficiating techniques of selective flocculation and ozonation, a synergistic phenomena occurs and a c... | 11/11/1997 |
| 5683590 | Treatment of waste paper A process for recovering inorganic material from an effluent suspension produced in the treatment of waste paper. The effluent suspension, in the form of an aqueous suspension containing at least 2% by weight of dry solids, is contacted with an oxygen-con... | 11/04/1997 |
| 5647902 | Stabilized calcium carbonate composition using sodium carbonate and mixtures of acids and uses therefor An improved form of calcium carbonate which is acid resistant to enable its use as a filler material in the making of neutral to weakly acid paper, and a process for producing this acid resistant calcium carbonate are provided. This acid resistant calcium... | 07/15/1997 |
