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Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 6014882 | Process and device for rolling out the ends of a coiled strip in a reversing rolling mill A method of rolling out the ends of a coiled strip in a reversing rolling mill having reels disposed on both sides thereof minimizes a length of strip at the strip ends having a non-conforming thickness. A start of the strip is introduced into the roll ga... | 01/18/2000 |
| 5778717 | Process and device for rolling bands with uneven thickness and/or length distribution over their width The present invention relates to a process and to a device for the rolling of bands (B) with uneven thickness and/or length distribution over their width by using at least one control roller (5, 9, 21, 27, 41, 43) located on the inlet and/or outlet side o... | 07/14/1998 |
| 5579788 | Apparatus for the surface treatment of material to be treated by means of a treatment liquid, in particular a band pickling plant In an apparatus for the surface treatment of material to be treated by means of a treatment liquid, in particular a band pickling plant, with a vessel (1) receiving the treatment liquid (F), through which the material (S) to be treated can be conveyed, wi... | 12/03/1996 |
| 5484513 | Process and apparatus for producing a rough generated surface on a cylindrical body of rotation The invention relates to a process and apparatus for producing a rough and hard generated surface on a cylindrical body of rotation, more particularly a roll for metal strips. To rapidly obtain as uniform a surface roughness as possible, the body of rotat... | 01/16/1996 |
| 5142896 | Cluster mill with hydraulic screw-down The invention relates to a cluster mill having four columns 5, 6 connecting the lower part 1 and the upper part 2 for the sets of rolls 3, 4. Associated with each column 5, 6 is a lifting device 11, 12 enabling the lower part 1 and the upper part 2 to be ... | 09/01/1992 |
