Granted Patent
Utility
US 4,851,821 · App. 06/947,913
Disposable chemical container
Inventors:
Richard E. Howard, Joseph P. Keene
Patented Case
View Patent ↗
Granted: Jul 25, 1989
Filed: Dec 29, 1986
Inventors
Richard E. Howard
Joseph P. Keene
Assignee (at issue)
Air Products and Chemicals, 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.