Famous Patents
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 |
| 7204461 | Wire cloth A wire cloth includes metallic warp wires and metallic weft wires interwoven with one another, wherein the weft wires have each a diameter which is equal or smaller than a clear distance between two neighboring warp wires, and wherein the weft wires are constricted ... | 04/17/2007 |
| 6284013 | Method for preparing high-purity ruthenium sputtering target and high-purity ruthenium sputtering target There is provided a high-purity ruthenium sputtering target with a low impurity content, in particular producing extremely few particles, which is suitable for applications such as the formation of semiconductor thin films. The high-purity ruthenium sputt... | 09/04/2001 |
| 5122185 | Low pressure drop, high surface area platinum recovery system in a nitric acid plant This invention is a method for the recovery of precious metal selected from the group consisting of platinum and rhodium lost from a platinum-containing catalyst during ammonia oxidation processes at a temperature above 850° C. which comprises bringing s... | 06/16/1992 |
| 4497657 | Method for recovering platinum in a nitric acid plant Improved recovery of platinum lost from the catalyst gauze in a nitric acid plant is obtained by using palladium containing recovery gauzes configured to enhance the mass transfer characteristics of the system.... | 02/05/1985 |
| 4412859 | Method for recovering platinum in a nitric acid plant Improved recovery of platinum lost from the catalyst gauze in a nitric acid plant is obtained by using palladium containing recovery gauzes configured to enhance the mass transfer characteristics of the system.... | 11/01/1983 |
