Patent · US Expired

Marker for use in a magnetic anti-theft security system and method for marking the marker

US6663981B1 · kind B1 · utility

5Cited by

4References

9Claims

0Family size

Assignee

Vacuumschmelze GmbH & Co. KG · DE

Inventors

Hartwin Weber · Hanau, DE
Gernot Hausch · Langenselbold, DE
Ottmar Roth · Ortenburg, DE

Key dates

Filing date	Jun 8, 1999
Grant date	Dec 16, 2003
Priority date	—
Expiry date	Jun 8, 2019

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/12986
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A marker for use in a magnetic anti-theft security system has an amorphous ferromagnetic alloy alarm strip and at least one activation strip. The semi-hard magnetic alloy for the activation strip contains 8 to 25 weight % Ni, 1.5 to 4.5 weight % Al, 0.5 to 3 weight % Ti and balance of iron.The alloy is distinguished over known, employed alloys by excellent magnetic properties and a high resistance to corrosion. Further, the alloy can be excellently cold-worked before the annealing.

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