Granted Patent
Utility
US 5,539,998 · App. 08/303,986
High purity bulk chemical delivery system
Inventors:
Lewis J. Mostowy, Jr., Naser Mahmud Chowdhury
Patented Case
View Patent ↗
Granted: Jul 30, 1996
Filed: Sep 9, 1994
Inventors
Lewis J. Mostowy, Jr.
Naser Mahmud Chowdhury
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.