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. 12, 1991
Filed:
Nov. 02, 1989
Applicant:
Inventor:
Fereshteh Tadayon, Asheville, NC (US);
Assignee:
Alusuisse Lonza-Services Ltd, Zurich, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
210 85 ; 2105101 ; 75407 ; 266 99 ; 266227 ;
Abstract
The present invention relates to a ceramic body suitable for use in molten metal filtration applications having a built-in preheat indicator and method for forming such a ceramic body. The preheat indicator comprises a dye having a burnoff temperature substantially equal to the desired preheat temperature applied to a surface of the ceramic body. In a preferred embodiment, the dye comprises an aniline dye such as Backmeier's crystal violet.