Granted Patent
Utility
US 4,937,387 · App. 07/235,357
Processes for preparing diaryl sulfones
Inventors:
Ulrich Steiner, Walter T. Reichle
Patented Case
View Patent ↗
Granted: Jun 26, 1990
Filed: Aug 23, 1988
Inventors
Ulrich Steiner
Walter T. Reichle
Assignee (at issue)
Amoco Corporation
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.