Granted Patent
Utility
US 6,355,456 · App. 09/487,604
Process of using wet grain residue from ethanol production to feed livestock for methane production
Inventors:
David E. Hallberg, Victor W. Schlesinger
Patented Case
View Patent ↗
Granted: Mar 12, 2002
Filed: Jan 19, 2000
Inventors
David E. Hallberg
Victor W. Schlesinger
Assignee (at issue)
DAKOTA AG ENERGY, 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.