Patent · US Expired

Filter system

US7419524B2 · kind B2 · utility

4Cited by

9References

5Claims

0Family size

Assignee

Carl Freudenberg KG · DE

Inventors

Thomas Caesar · Weinheim, DE
Renate Tapper · Bensheim, DE
Thomas Schroth · Worms, DE

Key dates

Filing date	Mar 12, 2003
Grant date	Sep 2, 2008
Priority date	—
Expiry date	Sep 7, 2023

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S55/31
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A filter system includes several filters, particularly a main filter and at least one prefilter, which are disposed one after another and are made of a filter material that is encompassed by frames. The sides of the frame of the main filter and the frame/s of the prefilter/s, which face each other, include connecting elements. The individual filters can be coupled to each other in a form-fitting manner.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.