Granted Patent
Utility
US 4,832,112 · App. 06/783,369
Method of forming a fine-grained equiaxed casting
Inventors:
John R. Brinegar, Keith Chamberlain, James J. Vresics, William J. DePue
Patented Case
View Patent ↗
Granted: May 23, 1989
Filed: Oct 3, 1985
Inventors
John R. Brinegar
Keith Chamberlain
James J. Vresics
William J. DePue
Assignee (at issue)
HOWMET 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.