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. 07, 1978
Filed:
Oct. 03, 1974
Applicant:
Inventors:
Hans Gruner, Duisburg-Rahm, DE;
Hans Schrewe, Duisburg-Ungelsheim, DE;
Erich Keuper, Dusseldorf, DE;
Fritz-Peter Pleschhutschnigg, Angermund, DE;
Assignee:
Mannesmann Aktiengesellschaft, Dusseldorf, DE;
Primary Examiner:
Int. Cl.
CPC ...
B22D / ; B28B / ;
U.S. Cl.
CPC ...
252 62 ; 106 3827 ; 106 389 ; 252182 ; 252350 ;
Abstract
A casting powder for steel having, for example, ground blast furnace slag, and/or sand and caustic lime CaF.sub.2 as basic substances with further additives which include up to 10% of additives decomposing completely at temperatures below 600.degree. C under development of gas whereby the mole-volume of developed gas per mole-weight gas-generating additive (m.sup.3 /Kg) is not smaller than 0.5. Ammonium nitrite or ammonium carbonate is preferred whereby the gaseous decomposition products will be nitrogen, water vapor and/or carbon dioxide.