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:
Oct. 21, 1997
Filed:
Jul. 01, 1996
Applicant:
Inventors:
Thomas J Thornton, Whitehall, MI (US);
Julie A Faison, Whitehall, MI (US);
Neil E Paton, N. Muskegon, MI (US);
Assignee:
Howmet Research Corporation, Whitehall, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B22D / ;
U.S. Cl.
CPC ...
216101 ; 29889721 ; 164 36 ; 164132 ;
Abstract
A method of removing ceramic material, such as for example a ceramic core, from a metallic cast or other component involves contacting the metallic cast component and a caustic ceramic leaching medium at elevated temperature for a time effective to substantially remove the ceramic material from the component and providing an oxygen getter in the caustic ceramic leaching medium in an amount effective to avoid deleterious surface corrosion of the component while the ceramic material is being removed therefrom.