Granted Patent
Utility
US 5,508,400 · App. 08/230,562
Preparation of cyclic urea compounds
Inventors:
Wendell W. Wilkerson, James D. Rodgers
Patented Case
View Patent ↗
Granted: Apr 16, 1996
Filed: Apr 20, 1994
Inventors
Wendell W. Wilkerson
James D. Rodgers
Assignee (at issue)
The DuPont Merck Pharmaceutical 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.