US Patent 7678449 Iridescent magnetic effect pigments comprising a ferrite layer

Patent 7678449 was granted and assigned to BASF on March, 2010 by the United States Patent and Trademark Office.

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Patent

Patent attributes

Current Assignee

BASF

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

76784490

Patent Inventor Names

Steven Jones0

Date of Patent

March 16, 2010

Patent Application Number

115483610

Date Filed

October 11, 2006

Patent Primary Examiner

‌

H. (Holly) T. Le

Patent abstract

Iridescent magnetic pigments are produced by depositing a ferrite layer and a second metal oxide layer in succession on a substrate. The substrate may be platy and is coated with the ferrite, which is then coated with the second metal oxide layer to provide interference color effect. At least one of the layers is magnetic. The magnetic pigment may be used in coatings such as paints.

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