Granted Patent
Utility
US 4,241,219 · App. 06/061,712
Treatment of carbonylation effluent
Inventor:
Chee-Gen Wan
Patented Case
View Patent ↗
Granted: Dec 23, 1980
Filed: Jul 30, 1979
Inventor
Chee-Gen Wan
Assignee (at issue)
Halcon Research and Development Corp.
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.