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:
Jan. 07, 2003
Filed:
Nov. 22, 2000
Applicant:
Inventors:
Norbert Etzenbach, Köln, DE;
Kai Bütje, Duisburg, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09C 1/20 ; C04B 1/600 ; C01G 4/902 ;
U.S. Cl.
CPC ...
C09C 1/20 ; C04B 1/600 ; C01G 4/902 ;
Abstract
The present invention relates to a process for producing iron oxide red pigments containing the step of forming a suspension of haematite nuclei by reaction between dilute nitric acid and elemental iron above 90° C. and to pigments of pure color and their use.
Etzenbach, Norbert. (2003). Process for producing iron oxide pigments (U.S. Patent No. 6503315). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6503315
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile