Granted Patent
Utility
US 6,506,463 · App. 09/485,475
Copolyamide active-passive oxygen barrier resins
Inventors:
Paul J. Cahill, Joel A. Richardson, Raymond V. Wass
Patented Case
View Patent ↗
Granted: Jan 14, 2003
Filed: Feb 11, 2000
Inventors
Paul J. Cahill
Joel A. Richardson
Raymond V. Wass
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.