Granted Patent
Utility
US 6,090,737 · App. 09/218,636
Removal of lead from organic diaryl carbonate reaction mixtures
Inventor:
John Yaw Ofori
Patented Case
View Patent ↗
Granted: Jul 18, 2000
Filed: Dec 22, 1998
Inventor
John Yaw Ofori
Assignee (at issue)
General Electric 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.