Granted Patent
Utility
US 4,522,762 · App. 06/440,565
Diisocyanate
Inventors:
Richard W. Oertel, III, Reinhard H. Richter, Benjamin W. Tucker
Patented Case
View Patent ↗
Granted: Jun 11, 1985
Filed: Nov 10, 1982
Inventors
Richard W. Oertel, III
Reinhard H. Richter
Benjamin W. Tucker
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.