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:
Dec. 22, 1992
Filed:
Oct. 02, 1991
Applicant:
Inventors:
Hans-Hermann Heins, Leverkusen, DE;
Peter Danz, Cologne, DE;
Martin Ullrich, Leverkusen, DE;
Hanno Henkel, Krefeld, DE;
Klaus Holzer, Leverkusen, DE;
Eberhard Zirngiebl, Cologne, DE;
Siegfried Gruhl, Engelskirchen, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J / ; B01J / ; B01J / ; C01B / ;
U.S. Cl.
CPC ...
502182 ; 423239 ; 502159 ; 502180 ;
Abstract
A carbon- and nitrogen-based catalyst consisting essentially of active carbon or active coke and comprising at least 90% by weight of graphite structures containing at least 10% of pores larger than 100 nm in diameter and having incorporated therein an isocyanate which forms C-N-ring structures, the percentage graphite content being at least 90% by weight. The catalayst is especially effective in the low temperature reduction of nitrogen oxides in waste gases.