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:
Sep. 11, 1990
Filed:
Jul. 25, 1989
Applicant:
Inventor:
Gunther Reichert, Cologne, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B / ; C01B / ; C02F / ;
U.S. Cl.
CPC ...
423231 ; 210749 ; 210751 ; 252-851 ; 502316 ;
Abstract
Hydrogen sulphide is removed (for example from drilling muds) using porous iron oxides which consist to the extent of at least 80% by weight of Fe.sub.3 O.sub.4 and in which at least 10% of their pore volume is in the form of pores of diameters in the range from 2000 to 6000 .ANG..