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. 13, 1990
Filed:
Sep. 30, 1988
Applicant:
Inventors:
Friedrich Wolfsgruber, Tacherting, DE;
Hartmut Meyer-Grunow, Garching, DE;
Detlef Missol, Engelsberg-Offenham, DE;
Jochem Richter, Namborn, DE;
Julius Veit, Scheidt, DE;
Assignees:
SKW Trostberg Aktiengesellschaft, Trostberg, DE;
Halbergerhuette GmbH, Saarbruecken, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C / ;
U.S. Cl.
CPC ...
420 29 ; 75526 ; 75533 ; 75539 ;
Abstract
The present invention provides an agent for the introduction of nitrogen into cast iron, wherein it contains or consists of at least 50% by weight of at least one nitrogen-containing compound with an N--C--N structure and/or a mixture of calcium cyanamide with nitrides of silicon, ferrosilicon, manganese and chromium. The present invention also provides a process for the introduction of nitrogen into cast iron using this agent.