Granted Patent
Utility
US 4,284,585 · App. 06/106,627
Process for the preparation of acetic anhydride
Inventor:
Joseph Pugach
Patented Case
View Patent ↗
Granted: Aug 18, 1981
Filed: Dec 26, 1979
Inventor
Joseph Pugach
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.