Patent · US Expired

Table or workbench covering

US6959652B2 · kind B2 · utility

1Cited by

4References

20Claims

0Family size

Assignee

Carl Freudenberg KG · DE

Inventors

Hans-Michael Kuhl · Hirschberg, DE
Gerhard Graab · Mannheim, DE

Key dates

Filing date	Oct 15, 2002
Grant date	Nov 1, 2005
Priority date	—
Expiry date	Oct 10, 2023

Classification

Technology area (CPC H)Electricity
CPC primaryH05F3/00
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A table- or workbench covering made of a first electrically conductive layer having a specific resistance in the range of 5×106 Ωcm to 5×109 Ωcm, and a second electrically conductive layer having a specific resistance in the range of 5×104 Ωcm to 5×107 Ωcm, the layers being made of rubber mixtures containing antistatic agents and/or electrically conductive particles and are calendered together as well as connected by vulcanization, and which have a sulfate content of <100 μg/cm2, extractable using deionized water.

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