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 |
| 6117452 | Fatty ester combinations The thermoforming of compositions containing active agents is carried out by processing compositions containing certain fatty esters in combination.... | 09/12/2000 |