Granted Patent
Utility
US 4,846,899 · App. 07/067,299
Nitride dispersion-strengthened steels and method of making
Inventor:
Andrew Wilson
Patented Case
View Patent ↗
Granted: Jul 11, 1989
Filed: Jun 29, 1987
Inventor
Andrew Wilson
Assignee (at issue)
United Kingdom Atomic Energy Authority
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.