Granted Patent
Utility
US 4,813,440 · App. 07/059,035
Apparatus for degreasing a continuous sheet of thin material
Inventors:
Peter E. Johnson, James Young
Patented Case
View Patent ↗
Granted: Mar 21, 1989
Filed: Jun 8, 1987
Inventors
Peter E. Johnson
James Young
Assignee (at issue)
Entek Manufacturing LLC
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.