Celebrity Inventors
Mark Twain (Samuel L. Clemens) received Patent No. 121,992 for "An Improvement in Adjustable and Detachable Straps for Garments." He later received two more patents: one for a self-pasting scrapbook and one for a game to help players remember important historical dates.
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| Number | Title | Issue Date |
| 6468483 | Process for treating alumina-bearing ores to recover metal values therefrom A method for processing alumina-bearing ores such as bauxite to recover iron, aluminum, silicon and titanium metal values therefrom the method comprising the steps of adding the alumina-bearing ores to a digester containing an acid to provide a mixture of... | 10/22/2002 |
| 6248302 | Process for treating red mud to recover metal values therefrom A method for processing red mud to recover iron, aluminum, silicon and titanium metal values therefrom the method comprising the steps of adding the red mud to a digester containing an acid to provide a mixture of acid and red mud and heating the mixture ... | 06/19/2001 |
| 6231822 | Recovering chloride and sulfate compounds from spent potliner A method of recovering chloride and sulfate salts from spent potliner using acid digestion.... | 05/15/2001 |
| 6217836 | Recovering carbon, silica and alumina from spent potliner Spent potliner from aluminum reduction cells is treated, for example, with sulfuric acid to recover carbon, silica and alumina or to recover a vitrified product of silca and alumina.... | 04/17/2001 |
| 6217840 | Production of fumed silica A method for producing fumed silica and a fluorine-containing product from a source of silica in solid form and a solid material containing fluorine, the solid material selected from the group consisting of sodium aluminum tetrafluoride, cryolite, aluminu... | 04/17/2001 |
| 6193944 | Method of recovering fumed silica from spent potliner Spent potliner from an aluminum reduction cell is subject to an acid digest and the digest may be adjusted to produce a first gas component comprised of at least one material selected from the group consisting of silicon tetrafluoride, hydrogen fluoride, ... | 02/27/2001 |
| 6187275 | Recovery of AlF3 from spent potliner A method of recovering AlF3 from spent potliner using an acid digest to form gaseous HF which is converted to hydrofluoric acid and reacted with alumina trihydrate to form AlF3.... | 02/13/2001 |
| 6123908 | Method of treating spent potliner material from aluminum reduction cells A process of treating spent potliner material from aluminum reduction cells and recovering useful products. In the process of the present invention, spent potliner material is introduced into an acid digester containing, for example, sulfuric acid. As a r... | 09/26/2000 |
| 5955042 | Method of treating spent potliner material from aluminum reduction cells A process for treating spent potliner material from aluminum reduction cells and recovering useful products. In the process, spent potliner material is introduced into an acid digester containing, for example, sulfuric acid. A gas component is produced wh... | 09/21/1999 |
| 5723097 | Method of treating spent potliner material from aluminum reduction cells A method of treating spent potliner material from aluminum reduction cells is disclosed. The spent potliner material is introduced into a sulfuric acid digester to produce a gas component including hydrogen fluoride and hydrogen cyanide and a slurry compo... | 03/03/1998 |
