Granted Patent
Utility
US 6,085,548 · App. 09/138,489
Control vent system for ultra-high purity delivery system for liquefied compressed gases
Inventors:
Naser Mahmud Chowdhury, John Irven, Dao-Hong Zheng, Sukla Chandra, Kenneth Coull, Reiner Taege
Patented Case
View Patent ↗
Granted: Jul 11, 2000
Filed: Aug 24, 1998
Inventors
Naser Mahmud Chowdhury
John Irven
Dao-Hong Zheng
Sukla Chandra
Kenneth Coull
Reiner Taege
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.