Granted Patent
Utility
US 5,228,245 · App. 07/848,784
Non-machining surface strengthening of transformation toughened materials
Inventors:
Roy W. Rice, Jyoti P. Chakraverty
Patented Case
View Patent ↗
Granted: Jul 20, 1993
Filed: Mar 10, 1992
Inventors
Roy W. Rice
Jyoti P. Chakraverty
Assignee (at issue)
W.R. Grace & Co. Conn.
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.