Granted Patent
Utility
US 4,948,423 · App. 07/382,599
Alloy preparation of hydrogen storage materials
Inventors:
Michael A. Fetcenko, Steven P. Sumner, Joseph LaRocca
Patented Case
View Patent ↗
Granted: Aug 14, 1990
Filed: Jul 21, 1989
Inventors
Michael A. Fetcenko
Steven P. Sumner
Joseph LaRocca
Assignee (at issue)
Energy Conversion Devices, 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.