Granted Patent
Utility
US 4,925,993 · App. 07/366,769
Process for preparing chlorofluorocarbons via an in situ generated activated aluminum trichloride catalyst and products resulting therefrom
Inventor:
Robert C. Zawalski
Patented Case
View Patent ↗
Granted: May 15, 1990
Filed: Jun 14, 1989
Inventor
Robert C. Zawalski
Assignee (at issue)
Dixie 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.