Granted Patent
Utility
US 6,703,454 · App. 10/013,317
Adsorber system to replace water column in a polyester process
Inventor:
Bruce Roger DeBruin
Patented Case
View Patent ↗
Granted: Mar 9, 2004
Filed: Dec 7, 2001
Inventor
Bruce Roger DeBruin
Assignee (at issue)
Eastman Chemical Company
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.