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:
Dec. 17, 2002
Filed:
Aug. 08, 2001
Applicant:
Inventors:
Gregory R. Frank, Morristown, TN (US);
Ronald J. Keller, Grand Haven, MI (US);
Rodney S. Haaland, Suffolk, VA (US);
Charles F. Caccavale, Wharton, NJ (US);
Alfred P. Kaulius, Jr., Muskegon, MI (US);
Assignee:
Howmet Research Corporation, Whitehall, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22C 1/00 ; B22C 9/10 ; B22C 9/12 ;
U.S. Cl.
CPC ...
B22C 1/00 ; B22C 9/10 ; B22C 9/12 ;
Abstract
An impregnated fired porous alumina-based ceramic core for use in an investment shell mold in the casting of molten metals and alloys wherein the core is impregnated with yttria to improve core creep resistance at elevated casting temperatures and times.