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Class Information
Number: 210/277
Name: Liquid purification or separation > Particulate material type separator, e.g., ion exchange or sand bed > With rehabilitation means > Backwash or blowback means > Flow controller external of closed casing
Description: Apparatus in which flow of fluid is controlled by a flow controller external of the casing.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7361281 |
High efficiency ion exchange system and method for removing chromium from water |
Apr. 22, 2008 |
| 7276160 |
Method and apparatus for metal removal by ion exchange |
Oct. 2, 2007 |
| 7270745 |
Liquid filtration apparatus embodying super-buoyant filtration particles |
Sep. 18, 2007 |
| 7204930 |
Water purification system and method |
Apr. 17, 2007 |
| 7160441 |
Urban runoff water treatment methods and systems |
Jan. 9, 2007 |
| 6706195 |
High efficiency ion exchange system for removing arsenic from water |
Mar. 16, 2004 |
| 6638422 |
Liquid filtration apparatus and method embodying filtration particles having specific gravity less than liquid being filtered |
Oct. 28, 2003 |
| 6521126 |
Pipe gallery for water filtration systems |
Feb. 18, 2003 |
| 6238560 |
Collapsible filter element assembly |
May. 29, 2001 |
| 6238556 |
Filtration system including a back washable pre-filtration apparatus |
May. 29, 2001 |
| 5932092 |
Filtering apparatus having positively buoyant and negatively buoyant particulate |
Aug. 3, 1999 |
| 5910244 |
Adaptable control valve for fluid treatment system |
Jun. 8, 1999 |
| 5833867 |
System and method for backwashing multiple filtration vessels |
Nov. 10, 1998 |
| 5759387 |
Grey water filter tank recovery system and filter backwashing system |
Jun. 2, 1998 |
| 5591347 |
Single cell gas flotation separator with filter media |
Jan. 7, 1997 |
| 5516434 |
Single cell gas flotation separator with filter media |
May. 14, 1996 |
| 5449453 |
Plastic media filter |
Sep. 12, 1995 |
| 5445740 |
Floating media biofilter |
Aug. 29, 1995 |
| 5382366 |
Retardation installation with compressed air-diaphragm pump and stroke count device |
Jan. 17, 1995 |
| 5350505 |
Plastic media filter |
Sep. 27, 1994 |
| 5252231 |
Process and reactor for water treatment using a granular bed adapted to float during cleaning |
Oct. 12, 1993 |
| 5147530 |
Well water removal and treatment system |
Sep. 15, 1992 |
| 5122287 |
Filtration system |
Jun. 16, 1992 |
| 5069796 |
System for removing volatile components from water derived from wells |
Dec. 3, 1991 |
| 5009776 |
Filter system |
Apr. 23, 1991 |
| 5006240 |
Water-treatment system |
Apr. 9, 1991 |
| 4896435 |
Replaceable wear parts for centrifugal pellet dryers |
Jan. 30, 1990 |
| 4885083 |
Single chamber filter vessel |
Dec. 5, 1989 |
| 4780219 |
System for filtering suspended solids from a liquid |
Oct. 25, 1988 |
| 4744897 |
Sweeper type apparatus for clearing the deposition formed on the bottom of a pond |
May. 17, 1988 |
| 4663033 |
Reactivateable adsorption filter assembly |
May. 5, 1987 |
| 4643836 |
Radial flow filter having air fluidizing backwash means |
Feb. 17, 1987 |
| 4634528 |
Filter for intra-channel clarification |
Jan. 6, 1987 |
| 4617131 |
Method and system of cleansing a filter bed |
Oct. 14, 1986 |
| 4454033 |
Filtering apparatus |
Jun. 12, 1984 |
| 4434051 |
Multiple valve apparatus for simulated moving bed adsorption processes |
Feb. 28, 1984 |
| 4409033 |
Simulated moving bed separation process for high viscosity feed streams |
Oct. 11, 1983 |
| 4343699 |
Convertible dual container storage system |
Aug. 10, 1982 |
| 4326956 |
Backwashable filter system |
Apr. 27, 1982 |
| 4276181 |
Process and apparatus for separation by coalescence of emulsions |
Jun. 30, 1981 |
| 4246118 |
Apparatus for separating solid and liquid |
Jan. 20, 1981 |
| 4244822 |
Industrial technique magnetic apparatus |
Jan. 13, 1981 |
| 4228013 |
Method and apparatus for recovery of heavy metal ions from dilute aqueous solution |
Oct. 14, 1980 |
| 4208288 |
Filtering apparatus |
Jun. 17, 1980 |
| 4145280 |
Method and device for separating a mixture |
Mar. 20, 1979 |
| 4082664 |
Filter and method |
Apr. 4, 1978 |
| 4075102 |
Liquid processing media bed drain system |
Feb. 21, 1978 |
| 4051032 |
Water treatment system |
Sep. 27, 1977 |
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