Granted Patent
Utility
US 5,331,106 · App. 07/831,120
Resource recovery system
Inventor:
Stanley E. Spas
Patented Case
View Patent ↗
Granted: Jul 19, 1994
Filed: Feb 4, 1992
Inventor
Stanley E. Spas
Assignee (at issue)
AEROJET-GENERAL CORPORATION
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.