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Class Information
Number: 210/337
Name: Liquid purification or separation > Plural distinct separators > Filters > In series for prefilt flow > Nested units
Description: Apparatus arranged in superimposed or nested relation, each unit being removable from the other.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7001507 |
Retention and removal of debris and pollutants from surface water runoff |
Feb. 21, 2006 |
| 6881330 |
Multi-stage EDM filter |
Apr. 19, 2005 |
| 6702941 |
Fluid treatment elements adapted for cross flow treatment |
Mar. 9, 2004 |
| 6585892 |
Concentrically-arranged flexible media and support basket with second stage cartridge filter |
Jul. 1, 2003 |
| 6572765 |
Filtering system for swimming pool |
Jun. 3, 2003 |
| 6569330 |
Filter coalescer cartridge |
May. 27, 2003 |
| 6495040 |
Septic tank filtering system |
Dec. 17, 2002 |
| 6491818 |
Suction strainer with an internal core tube |
Dec. 10, 2002 |
| 6478957 |
Filtering apparatus for a wastewater treatment tank |
Nov. 12, 2002 |
| 6416664 |
Waste water filter having multiple wall filter elements and outlet protection |
Jul. 9, 2002 |
| 6387261 |
Serviceable filter with bypass |
May. 14, 2002 |
| 6364120 |
Filter tub assembly for deep fryer |
Apr. 2, 2002 |
| 6331247 |
Septic tank filtering system |
Dec. 18, 2001 |
| 6241945 |
Modular combined pump, filtration, oxygenation and/or debubbler apparatus |
Jun. 5, 2001 |
| 6231758 |
Curb-inlet storm drain systems for filtering trash and hydrocarbons |
May. 15, 2001 |
| 6136190 |
Septic tank filtering system |
Oct. 24, 2000 |
| 6106707 |
Curb-inlet storm drain systems for filtering trash and hydrocarbons |
Aug. 22, 2000 |
| 6103115 |
Wastewater skimmings dewatering unit |
Aug. 15, 2000 |
| 5993372 |
Method and apparatus for collecting and containing hydrocarbon spills and leaks |
Nov. 30, 1999 |
| 5958226 |
Storm drain filter with removable debris tray |
Sep. 28, 1999 |
| 5954952 |
Stormwater catch basin filter assembly |
Sep. 21, 1999 |
| 5932098 |
Filtration apparatus for brewing and drinking coffee and like beverages and concurrently enabling a user to drink directly from the apparatus |
Aug. 3, 1999 |
| 5928506 |
Water purifier for drinking water |
Jul. 27, 1999 |
| 5908558 |
Method and apparatus for removing contaminants from fluid columns |
Jun. 1, 1999 |
| 5824218 |
Permanent espresso filter insert |
Oct. 20, 1998 |
| 5720878 |
Panel filter system |
Feb. 24, 1998 |
| 5593597 |
Filtration system comprising sieving trough, helix and additional sieving apparatus |
Jan. 14, 1997 |
| 5039430 |
Method and apparatus for combining cardiotomy and venous blood |
Aug. 13, 1991 |
| 5034127 |
Filter assembly for purifying brine |
Jul. 23, 1991 |
| 4842744 |
Method for continuous filteration of fluids |
Jun. 27, 1989 |
| 4138339 |
Filter-purifier cartridge having separable elements |
Feb. 6, 1979 |
| 4107047 |
Filter-purifier cartridge |
Aug. 15, 1978 |
| 4052318 |
Mesh coffee filter |
Oct. 4, 1977 |
| 3969241 |
Method of and apparatus for separating chemical solutions in membrane processes |
Jul. 13, 1976 |
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