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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 |
| 7775232 | Flowing-down rainwater filtration device and rainwater storage device using the same A filtration device, which can be installed at a relatively low place below the full water level of a storage tank, is obtained. The filtration device is provided with a housing 22 attached to a lower part of an upper vertical pipe 21a an... | 08/17/2010 |
| 7309419 | Fluid diverter for a wastewater treatment system A device for diverting the flow of liquid in a wastewater treatment system in flow communication with effluent returning from a recirculating treatment section and in flow communication with a discharge line for removing a portion of treated effluent to a receiving ... | 12/18/2007 |
| 7270941 | Method of passivating of low dielectric materials in wafer processing A method of passivating silicon-oxide based low-k materials using a supercritical carbon dioxide passivating solution comprising a silylating agent is disclosed. The silylating agent is preferably an organosilicon compound comprising organo-groups with five carbon a... | 09/18/2007 |
| 7048849 | First flush rainwater diverter and collection system A first flush rainwater diverter and collection system for use with rainwater storage tanks primarily in domestic situations. The system comprises primary (13) and secondary (14) storage chambers, a T-piece (10) for connection in a rainwater flo... | 05/23/2006 |
| 7011107 | Adapter for a first flush water diverter An adapter for a first flush water diverter is disclosed. The adapter has a collector for receiving water from a containment area. A passage from a lower part of the collector allows water from the lower part to be directed to an attachment portion which in turn is ... | 03/14/2006 |
| 6955188 | Switch valve for the exhaust gases of an internal combustion engine The invention relates to a switch valve for the exhaust gases of an internal combustion engine. The switch valve includes a housing part in which an inlet and a first outlet and a second outlet are formed. A directional control member in the form of a swinging flap ... | 10/18/2005 |
| 6619312 | Flow control mechanism for an eaves trough downspout A flow control mechanism for an eaves trough downspout has a primary flow path through a housing from an inlet to a first outlet. A tubular arm extends from the housing and has a first end is in fluid communication with a second outlet. A deflector is piv... | 09/16/2003 |
| 6182680 | Rain water vessel A rain water vessel (1) includes a water inlet (21), a main tank (26), a dump tank (27) inside the main tank, and a diverter valve (31, 32). The diverter valve (31, 32) is, after a period without rainfall of less than 1 hour, normally in a first condition... | 02/06/2001 |
| 5836116 | Tank system A tank system includes a tank, a rainwater feed mechanism and a run-off for contaminated water. The rainwater feed mechanism includes a switch unit that passes contaminated water to the run-off. When large quantities of rainwater are received, the switch ... | 11/17/1998 |
| 5213130 | Irrigation system An irrigation system includes one or more valve assemblies which are connected in series to a pressurized source of water. Each valve assembly includes a cylindrical housing, a ball valve, an inlet and two outlets with one outlet generally opposite from t... | 05/25/1993 |
| 4497333 | Sequencing valve and irrigation system A valve having a hollow body, an inlet and outlet for supplying and discharging pressured liquid, the valve body has a normally open top and a closure is provided to close said open top when positioned over the top opening and held in place by pressure of... | 02/05/1985 |
| 4495960 | Suds return valve for automatic washers A suds return valve for automatic washers is provided in which a flapper valve can be manually set to save suds water for subsequent use, the valve being automatically returned to direct rinse liquid to drain after the suds water has reached a predetermin... | 01/29/1985 |
| 4428394 | Baffle mechanism and insert unit for downspout A downspout baffle mechanism is disclosed, adapted for use in conventional, vertically disposed downspouts for diverting controlled amounts of water descending in such downspouts to water collecting means located above and spaced from the normal downspout... | 01/31/1984 |
| 4301824 | Sump level maintenance system In a fluid circulation system of the type having a pump for supplying pressurized fluid to an apparatus requiring a supply of pressurized fluid, a sump containing a volume of fluid from which the pump draws its supply, and an overage fluid return line, a ... | 11/24/1981 |
| 4014361 | Automatic anti-siphon valve Each valve of the present invention is comprised of a hollow valve body, an inlet connectable to a source of pressurized water, a first outlet disposed at the top of the valve body for emptying into an irrigation basin, a second outlet for connection to t... | 03/29/1977 |
| 3951163 | Automatic anti-siphon valve Each valve of the present invention is comprised of a hollow valve body, an inlet connectable to a source of pressurized water, a first outlet disposed at the top of the valve body for emptying into an irrigation basin, a second outlet for connection to t... | 04/20/1976 |
