Patent · US Expired

Flat packing and method for the production thereof

US7309520B2 · kind B2 · utility

2Cited by

9References

11Claims

0Family size

Assignee

Carl Freudenberg KG · DE

Inventors

Steffen Kosack · Haßloch, DE
Thomas Klenk · Dossenheim, DE
Ulrich Liedtke · Hemsbach, DE
Frank Schultz · Roma, US

Key dates

Filing date	Feb 26, 2002
Grant date	Dec 18, 2007
Priority date	—
Expiry date	Jan 23, 2023

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T442/2861
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A flat gasket made up of at least one layer of nonwoven fabric consisting of a sheet of asbestos-free fibers or fiber mixtures and impregnated with a polymer, the sealing element consisting of at least one polytetrafluoroethylene-impregnated nonwoven fabric.

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