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:
Nov. 19, 2019
Filed:
Sep. 04, 2015
Applicant:
Lanxess Deutschland Gmbh, Cologne, DE;
Inventors:
Assignee:
LANXESS Deutschland GmbH, Cologne, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09C 1/24 (2006.01); C01G 49/06 (2006.01);
U.S. Cl.
CPC ...
C09C 1/24 (2013.01); C01G 49/06 (2013.01); C01P 2004/64 (2013.01); C01P 2006/12 (2013.01);
Abstract
The present invention relates to an improved process for producing iron oxide red pigments by the Penniman process using nitrate (also referred to as nitrate process or direct red process).