Granted Patent
Utility
US 6,648,034 · App. 10/155,726
Purgeable manifold for low vapor pressure chemicals containers
Inventors:
Charles Michael Birtcher, Martin Castaneda Martinez, Thomas Andrew Steidl, Gil Vivanco, David Silva
Patented Case
View Patent ↗
Granted: Nov 18, 2003
Filed: May 23, 2002
Inventors
Charles Michael Birtcher
Martin Castaneda Martinez
Thomas Andrew Steidl
Gil Vivanco
David Silva
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.