Granted Patent
Utility
US 4,937,115 · App. 07/286,579
Bacteria impermeable, gas permeable package
Inventor:
Dennis D. Leatherman
Patented Case
View Patent ↗
Granted: Jun 26, 1990
Filed: Dec 19, 1988
Inventor
Dennis D. Leatherman
Assignee (at issue)
PPG Industries, 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.