Granted Patent
Utility
US 6,315,941 · App. 09/339,293
Ceramic core and method of making
Inventors:
Ronald J. Keller, Rodney S. Haaland, Julie A. Faison
Patented Case
View Patent ↗
Granted: Nov 13, 2001
Filed: Jun 24, 1999
Inventors
Ronald J. Keller
Rodney S. Haaland
Julie A. Faison
Assignee (at issue)
Howmet Research Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.