Granted Patent
Utility
US 4,477,665 · App. 06/259,861
Substituted 2-keto-1,4-diazacycloalkanes
Inventors:
John T. Lai, Pyong-Nae Son
Patented Case
View Patent ↗
Granted: Oct 16, 1984
Filed: May 4, 1981
Inventors
John T. Lai
Pyong-Nae Son
Assignee (at issue)
B. F. Goodrich 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.