Granted Patent
Utility
US 5,287,910 · App. 07/943,704
Permanent mold casting of reactive melt
Inventors:
Gregory N. Colvin, Leonard L. Ervin, Robert F. Johnson
Patented Case
View Patent ↗
Granted: Feb 22, 1994
Filed: Sep 11, 1992
Inventors
Gregory N. Colvin
Leonard L. Ervin
Robert F. Johnson
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.