Patent · US Active

Marker for a magnetic theft protection system and method for its production

US8013743B2 · kind B2 · utility

0Cited by

37References

24Claims

0Family size

Assignee

Vacuumschmelze GmbH & Co. KG · DE

Inventors

Ottmar Roth · Ortenburg, DE
Hartwin Weber · Hanau, DE

Key dates

Filing date	Sep 7, 2007
Grant date	Sep 6, 2011
Priority date	—
Expiry date	Jul 6, 2030

Classification

Technology area (CPC G)Physics
CPC primaryG08B13/2442
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

Disclosed are markers for a magnetic theft protection system, which markers contain at least one oblong alarm strip made of an amorphous ferromagnetic alloy and at least one activation strip made of a molybdenum-free semi-hard magnetic alloy consisting essentially of NiaMbFeRest, wherein M is one or more of the elements from the group including Cr, W and V, and wherein a and b are weight percentages such that 15% by weight≦a≦25% by weight, and 2% by weight≦b≦8% by weight. The activation strip has a coercive force Hc of 10 A/cm to 25 A/cm and a remanence Br of at least 0.9 T.

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