Patent · US Expired

Cadmium-free optical steep edge filters

US6899954B2 · kind B2 · utility

10Cited by

10References

34Claims

0Family size

Assignee

Schott AG · DE

Inventors

Uwe Kolberg · Mainz, DE
Helge Vogt · Nackenheim, DE
Simone Monika Ritter · Mainz, DE
Burkhard Speit · Mainz, DE
Hans-Werner Schock · Stuttgart, DE
Christine Köble · Berlin, DE
Raymund Schäffler · Echterdingen, DE

Key dates

Filing date	Aug 20, 2002
Grant date	May 31, 2005
Priority date	—
Expiry date	Aug 20, 2022

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/12903
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A cadmium-free optical steep edge filter comprising I-III-VI compound semiconductor systems of stoichiometric or non-stoichiometric composition, where the I-III-VI compound semiconductors are systems with one or more of the following elements:

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