Granted Patent
Utility
US 4,631,348 · App. 06/746,447
Preparation of acetic acid
Inventor:
Nabil Rizkalla
Patented Case
View Patent ↗
Granted: Dec 23, 1986
Filed: Jun 19, 1985
Inventor
Nabil Rizkalla
Assignee (at issue)
The Halcon SD Group, 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.