Granted Patent
Utility
US 4,551,243 · App. 06/408,073
Anaerobic digester
Inventor:
John H. Martin
Patented Case
View Patent ↗
Granted: Nov 5, 1985
Filed: Aug 16, 1982
Inventor
John H. Martin
Assignee (at issue)
Energy Cycle, 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.