05015375 is referenced by 30 patents and cites 5 patents.

A rechargeable filter assembly for removal of contaminants from liquids of all types, particularly dry cleaning solvents comprising three nested and spaced apart concentric perforated metal cylinders defining an inner cavity and an outer cavity held in spatial relationship by a base plate and removable lid. With the lid and outer perforated cylinder (exterior shell) removed, a removable and disposable filter unit may be placed within the outer cavity and similar, or different, filter medium may be placed within the inner cavity. The gaskets of the filter unit in conjunction with the lid, the base, the conduit, exterior shell and the inner perforated cylinder provide seals which prevent liquids from bypassing the filter unit.

Title
Rechargeable filter assembly
Application Number
7/394546
Publication Number
5015375
Application Date
August 16, 1989
Publication Date
May 14, 1991
Inventor
Steven W Fleck
Tampa
FL, US
Agent
Pettis & McDonald
Assignee
MCF Systems
FL, US
IPC
B01D 29/21
B01D 27/08
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