Granted Patent
Utility
US 4,421,734 · App. 06/377,124
Sulfuric acid-sulfur heat storage cycle
Inventor:
John H. Norman
Patented Case
View Patent ↗
Granted: Dec 20, 1983
Filed: May 11, 1982
Inventor
John H. Norman
Assignee (at issue)
GA Technologies, 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.