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| Number | Title | Issue Date |
| 3990974 | Waste treatment and solids separating system A waste treatment and solids separating system includes a reservoir, feed means for causing waste liquid to flow into said reservoir and outwardly therefrom, ejector means disposed in said reservoir and in communication with atmosphere, pump means for wit... | 11/09/1976 |
| 3979293 | Apparatus for the purification of effluent An improved process for the purification of effluent is disclosed in which oxygenated effluent is introduced into a treatment zone in which a part of the total amount of biologically activated sludge used in the process is fixed on immersed bacterial beds... | 09/07/1976 |
| 3973572 | Self-purging apparatus for determining the quantitative presence of derived ions An apparatus for determining the quantitative presence of ions derived from solids, liquids, gases or similar items in which a deionized liquid dissolves the ions from the items, the liquid then is evaluated for conductivity by virtue of the presence of t... | 08/10/1976 |
| 3965005 | Method and apparatus for evaporating and separating multiple component solutions or mixtures Apparatus for separating feed solution, such as chrome or nickel plating rinse solutions, into a concentrated liquor portion and a solvent portion, comprising vertical shell and tube evaporator means for generating a stream of vapor and entrained droplets... | 06/22/1976 |
| 3948772 | Split stream ultraviolet purification device A split stream ultraviolet purification device, for the treatment of liquids that are normally opaque to ultraviolet radiation, is provided with means for adding a selected amount of clear water to the inlet stream of untreated liquid entering a ultraviol... | 04/06/1976 |
| 3947356 | Arrangement for regulating the moistening solution mixture in a moistening solution preparation plant for an offset printing press In an arrangement for regulating the moistening solution mixture for use in an offset printing press, a tank is provided with two separate spaces, one for the moistening solution mixture and the other for a moistening solution additive. A conduit system c... | 03/30/1976 |
| 3939072 | Apparatus for generating an oxidizing reagent for the treatment of polluted water A apparatus for obtaining monoperoxy sulphuric acid from hydrogen peroxide and sulphuric acid is disclosed. Hydrogen peroxide in the form of an aqueous solution with a concentration ranging from 35 to 100 percent and either concentrated sulphuric acid or ... | 02/17/1976 |
| 3932279 | Multi-tank ion exchange water treatment system A series of ion exchangers are connected in parallel in a water treatment system and are electrically interlocked against simultaneous regeneration. After an exchanger regenerates, it is held in standby status and is automatically returned to service use ... | 01/13/1976 |
