Granted Patent
Utility
US 4,918,251 · App. 07/333,004
Preparation of 2-halofluorobenzene
Inventor:
Robert E. Halvachs
Patented Case
View Patent ↗
Granted: Apr 17, 1990
Filed: Apr 4, 1989
Inventor
Robert E. Halvachs
Assignee (at issue)
MALLINCKRODT LLC
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.