Granted Patent
Utility
US 4,448,816 · App. 06/520,352
Compounds, compositions and process
Inventors:
Edward A. Barsa, Philip William Sherwood
Patented Case
View Patent ↗
Granted: May 15, 1984
Filed: Aug 4, 1983
Inventors
Edward A. Barsa
Philip William Sherwood
Assignee (at issue)
The Upjohn Co.
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.