Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 7268238 | Manufacturing method and apparatus of 4-fluoroethylene carbonate The method of producing 4-fluoroethylene carbonate (FEC), in which ethylene carbonate (EC) reacts with a mixture of fluorine and nitrogen gases, includes feeding a mixture gas of fluorine gas and nitrogen gas into a reactor having ethylene carbonate charged therein,... | 09/11/2007 |
| 7232789 | Catalyst for preparation of pentafluoroethane and preparation method thereof The method of preparing a chromium oxide catalyst for preparation of pentafluoroethane using a chloroethane compound includes heat treating chromium hydroxide powder at a temperature not higher than 300° C. to obtain chromium oxide powder, heat treating metal hydro... | 06/19/2007 |
| 6841705 | Method of producing difluoromethane A method of producing difluoromethane (HFC-32), which includes firstly reacting methylene chloride with hydrogen fluoride in gas phase at 280 to 340° C. in the presence of a fluorination catalyst to produce chlorofluoro methane, and secondly reacting the chlorofluo... | 01/11/2005 |
| 6387340 | Manufacturing method for lithium hexafluoro phosphate A method of preparing lithium hexafluoro phosphate (LiPF6) using phosphorous pentachloride (PCl5), lithium chloride (LiCl), and hydrogen fluoride (HF) as raw materials. The method includes the steps of: (a) reacting the phosphorous p... | 05/14/2002 |
| 6162955 | Manufacturing method for perfluoroethane A method for producing a high purity of perfluoroethane from hydrofluoroethane (C2 Fx Hy 1ࣘx, 1ࣘyࣘ5, x+y=6). Cobalt difluoride (CoF2) as a catalyst is activated into cobalt trifluoride (CoF3) as... | 12/19/2000 |
