Granted Patent
Utility
US 6,558,762 · App. 10/112,853
Zero oxygen permeation plastic bottle for beer and other applications
Inventors:
Paul J. Cahill, George E. Rotter, Stephen Y. Chen
Patented Case
View Patent ↗
Granted: May 6, 2003
Filed: Mar 28, 2002
Inventors
Paul J. Cahill
George E. Rotter
Stephen Y. Chen
Assignee (at issue)
BP Corporation North America 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.