Patent · US Expired

Small filter and method of its manufacture

US4900441A · kind A · utility

16Cited by

2References

6Claims

0Family size

Assignee

Sartorius AG · DE

Inventors

Andreas Graus · Nörten-Hardenberg, DE
Michael Schutzler · Rosdorf, DE

Key dates

Filing date	Feb 6, 1989
Grant date	Feb 13, 1990
Priority date	—
Expiry date	Feb 6, 2009

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29L2031/14
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

In a small filter with a one-piece plastic housing (1) manufactured with injection-molding technology in which a filter membrane (6) is located which is connected on its edge in a leakproof manner to the housing (1), the filter membrane (6) is covered at least on one side on the edge area (6") to be sealed by the injection molding which hardens in the injection molding form and is anchored in this injection molding.

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