Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Application No. | Application Title | Issue Date |
| 20110140318 | Molten metal containment structure having flow through ventilation Exemplary embodiments of the invention provide a molten metal containment structure including a refractory molten metal containment vessel having an external surface, and a metal casing for the vessel having an internal surface at least partially surrounding the externa... | 06/16/2011 |
| 20090229415 | Molten aluminum refining and gas dispersion system Aspects of this molten aluminum refining system include a rotor based injection system which provides for the injection and dispersion of both gas and flux for refining molten aluminum.... | 09/17/2009 |
| 20080296812 | Degassing Apparatus Having Duplex Vacuum Vessel A degassing apparatus having duplex vacuum vessels for removing impurity gases from molten steel by backflow of molten steel thereby homogenizing molten steel composition. The apparatus includes duplex vacuum vessels of first and second vacuum vessels fixedly arranged a... | 12/04/2008 |
| 20060123952 | Process and apparatus for extracting zinc A process and apparatus for extraction of zinc from a material containing one or more iron oxides and zinc oxide which facilitate heating a composite body of the material and a carbonaceous material in a reduction zone. The reduction zone contains a reducing atmosphere ... | 06/15/2006 |
