Patent · US Expired

Metal-free barrier-layer films

US5230948A · kind A · utility

9Cited by

6References

7Claims

0Family size

Assignee

Wolff Walsrode AG · DE

Inventors

Holger Preiss · Visselhövede, DE
Richarda Bochow · Bad Fallingbostel, DE
Klaus Lund · Walsrode, DE

Key dates

Filing date	May 20, 1992
Grant date	Jul 27, 1993
Priority date	—
Expiry date	May 20, 2012

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31928
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

The invention relates to composite films having a particularly good barrier effect against gases and water vapor without a metal layer, for example of aluminum, having to be present.

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