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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| Number | Title | Issue Date |
| 6197086 | System and method for minimizing slag carryover during the production of steel A system and method for detecting molten slag in a tap stream between a steel making vessel such as a basic oxygen furnace (BOF) and corresponding ladle. An infrared (IR) imaging or detecting device(s) is used to image/view the BOF-to-ladle tap stream, th... | 03/06/2001 |
| 6129888 | System and method for minimizing slag carryover during the taping of a BOF converter in the production of steel A system and method for detecting molten slag in a tap stream between a steel making basic oxygen furnace (BOF) and corresponding ladle. BOFs are used in the manufacture of steel. An infrared (IR) imaging or detecting device is used to image/view the BOF-... | 10/10/2000 |
| 5968227 | System and method for minimizing slag carryover during the tapping of a BOF converter in the production of steel A system and method for detecting molten slag in a tap stream between a steel making basic oxygen furnace (BOF) and corresponding ladle. BOFs are used in the manufacture of steel. An infrared (IR) imaging or detecting device is used to image/view the BOF-... | 10/19/1999 |
| 4478392 | Method for preventing the inclusion of slag into the molten steel taped from a converter The method for preventing the inclusion of slag into the molten steel tapped from a converter is disclosed. Such method comprises immersing an elongated stopper in a molten steel contained in the converter until the stopper is positioned at a predetermine... | 10/23/1984 |
| 4379547 | Continuous cold rolling and annealing apparatus for steel strip A continuous cold rolling and annealing apparatus for a steel strip so that interruption of a cold rolling mill part does not directly cause a continuous annealing furnace part to be interrupted, in which apparatus at least one cold rolling mill is locate... | 04/12/1983 |
| 4054275 | Continuous stream treatment of ductile iron A method and apparatus for producing modified grey iron, and particularly nodular cast iron, is disclosed. The apparatus comprises refractory elements including an inclined flow course for continuous reception of molten grey iron, a V-shaped inclined rece... | 10/18/1977 |
| 4042227 | Method and apparatus for continuously homogenizing and quenching aluminum billets This disclosure relates to a method and apparatus for continuously homogenizing and quenching aluminum billets in an in-line tandem system. The billets are conveyed into a furnace and transported through a series of stages therein where they are heated to... | 08/16/1977 |
