Granted Patent
Utility
US 5,252,733 · App. 07/534,811
Volatile crown ligand .beta.-diketonate alkaline earth metal complexes
Inventors:
John Anthony Thomas Norman, Guido P. Pez
Patented Case
View Patent ↗
Granted: Oct 12, 1993
Filed: Jun 5, 1990
Inventors
John Anthony Thomas Norman
Guido P. Pez
Assignee (at issue)
Air Products and Chemicals, 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.