Granted Patent
Utility
US 4,436,664 · App. 06/339,530
Nitrogen-containing polyether macrocycles with a sidearm containing neutral electron donor groups
Inventor:
George W. Gokel
Patented Case
View Patent ↗
Granted: Mar 13, 1984
Filed: Jan 15, 1982
Inventor
George W. Gokel
Assignee (at issue)
W. R. Grace & 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.