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:
Mar. 06, 1990
Filed:
Dec. 29, 1988
Applicant:
Inventor:
Friedrich Preisser, Buedingen, DE;
Assignee:
Degussa Aktiengesellschaft, Frankfurt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
159 473 ; 159 161 ; 159D / ; 203 10 ; 203 12 ; 203 49 ; 203100 ;
Abstract
Hardening-shop wastewaters can be removed without salt incrustations and without creating harmful exhaust steam during the evaporation of the wastewaters only if the heat is supplied across the free liquid surface to temperatures of 50.degree. C. to 85.degree. C. and a flow of air is conducted across the free liquid surface.