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 |
| 7172647 | Coolant mixture separator assembly for use in a polymer electrolyte membrane (PEM) fuel cell power plant A liquid-gas separator assembly is used in separating gas bubbles from a liquid coolant. The assembly includes a cylindrical housing containing a central tube which is surrounded by an annular chamber. The annular chamber is defined by the outer surface of the centr... | 02/06/2007 |
| 7118819 | Coolant mixture separator assembly for use in a polymer electrolyte membrane (PEM) fuel cell power plant A liquid-gas separator assembly is used in separating gas bubbles from a liquid coolant which liquid coolant is used in a polymer electrolyte membrane (PEM) fuel cell power plant. The assembly includes a cylindrical housing containing a central tube which is surroun... | 10/10/2006 |
| 6149407 | Gas-venting domestic hot water circulation pump When a hot water supply line has to be filled with hot water at all times it requires that the contents of the hot water supply line has to be returned to the hot water heater by a circulator pump. When gas-bubbles form in the hot water supply line, they ... | 11/21/2000 |
| 5902382 | Degassing system for a hydrocarbon dispenser A degassing system for a hydrocarbon dispenser including a hydrocarbon circulating pump (12). The system includes a degassing assembly (16) having an inlet connected to the outlet of the pump, a degassed hydrocarbon outlet (90), a takeoff outlet (20) for ... | 05/11/1999 |
| 5259871 | Deaeration device for oil-fired equipment The invention is directed to a deaeration device for oil supply installations for oil-fired boilers and similar plant equipment. The deaeration device includes a deaeration valve and a float which is made to float even in severely foaming oil by partially... | 11/09/1993 |
| 4555253 | Gas-liquid vortex separator-eliminator A gas-liquid vortex separator-eliminator which is adapted to be connected in a closed liquid circulating system having supply and return lines including a circulating pump connected therein for circulating liquid in the circulating system. The upright mai... | 11/26/1985 |
| 4475932 | Gas-liquid vortex separator-eliminator Closed liquid circulating systems, which have supply and return lines and a circulating pump, have a problem when gas present in the circulating liquid. A device for removing the gas by insertion in the system includes an upright main body which has an up... | 10/09/1984 |
| 4343630 | Liquid de-gassing unit In order to release gas dissolved in a liquid such as beer the liquid is injected as a spray into an agitation chamber having a liquid outlet at one end and a gas outlet at the other end. The gas outlet is controlled by a valve. Electrical contacts are pr... | 08/10/1982 |
