Granted Patent
Utility
US 4,785,121 · App. 06/947,798
Preparation of halophthalic anhydrides
Inventors:
Andrea Leone-Bay, Elliott Bay, Peter E. Timony
Patented Case
View Patent ↗
Granted: Nov 15, 1988
Filed: Dec 29, 1986
Inventors
Andrea Leone-Bay
Elliott Bay
Peter E. Timony
Assignee (at issue)
Stauffer 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.