Granted Patent
Utility
US 4,565,835 · App. 06/715,861
Diisocyanate
Inventors:
Richard W. Oertel, III, Benjamin W. Tucker, Reinhard H. Richter
Patented Case
View Patent ↗
Granted: Jan 21, 1986
Filed: Mar 25, 1985
Inventors
Richard W. Oertel, III
Benjamin W. Tucker
Reinhard H. Richter
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.