Granted Patent
Utility
US 4,925,492 · App. 07/099,080
Ceramic core for investment casting and method for preparation
Inventors:
Anant H. Kelkar, Frank A. Capodicasa, Jerry G. Weinstein
Patented Case
View Patent ↗
Granted: May 15, 1990
Filed: Sep 21, 1987
Inventors
Anant H. Kelkar
Frank A. Capodicasa
Jerry G. Weinstein
Assignee (at issue)
The Interlake Companies, Inc.
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.