Granted Patent
Utility
US 5,205,841 · App. 07/862,802
Apparatus and method for extracting hydrogen
Inventor:
Lev A. Vaiman
Patented Case
View Patent ↗
Granted: Apr 27, 1993
Filed: Apr 3, 1992
Inventor
Lev A. Vaiman
Assignee (at issue)
TPC 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.