Granted Patent
Utility
US 4,504,664 · App. 06/496,680
2-Piperidones
Inventors:
Richard V. Nelson, John F. Stephen
Patented Case
View Patent ↗
Granted: Mar 12, 1985
Filed: May 20, 1983
Inventors
Richard V. Nelson
John F. Stephen
Assignee (at issue)
ICI Americas, Inc.
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.