The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 20, 1976
Filed:
Mar. 15, 1974
Applicant:
Inventors:
Horst Bernhard, Darmstadt, DT;
Alfred Stein, Darmstadt, DT;
Reiner Esselborn, Darmstadt, DT;
Reiner Hesse, Darmstadt, DT;
Horst Russmann, Darmstadt, DT;
Assignee:
Merck Patent Gesellschaft mit beschrankter Haftung, Darmstadt, DT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09C / ;
U.S. Cl.
CPC ...
106291 ; 106304 ; 106300 ; 1063 / ; 106299 ; 424 63 ;
Abstract
Blue colored mica flake pigments are provided by coating mica flakes, or mica flakes optionally coated with a uniform metallic oxide layer, with a uniform layer of a low-solubility iron compound convertible into Berlin blue [ferric hexacyanoferrate(II)], and then converting this layer into Berlin blue.