Granted Patent
Utility
US 5,288,877 · App. 07/725,849
Continuous process for preparing indolenine compounds
Inventors:
Charles H. Hoelscher, Bruce R. Anderson
Patented Case
View Patent ↗
Granted: Feb 22, 1994
Filed: Jul 3, 1991
Inventors
Charles H. Hoelscher
Bruce R. Anderson
Assignee (at issue)
PPG Industries, 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.