Granted Patent
Utility
US 4,843,169 · App. 06/888,539
Method of preparing alpha-arylalkanoic esters
Inventor:
Robert Chapman
Patented Case
View Patent ↗
Granted: Jun 27, 1989
Filed: Jul 21, 1986
Inventor
Robert Chapman
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.