Granted Patent
Utility
US 5,342,629 · App. 07/722,853
Preservation of wood chips
Inventors:
Roger A. Brown, Richard L. Pilling, Donald C. Young
Patented Case
View Patent ↗
Granted: Aug 30, 1994
Filed: Jun 28, 1991
Inventors
Roger A. Brown
Richard L. Pilling
Donald C. Young
Assignee (at issue)
Union Oil Company of California
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.