Granted Patent
Utility
US 6,184,416 · App. 09/561,071
Lithium aluminate as a catalyst support for hydrogenation of aromatic amines
Inventors:
Hao Ding, John N. Armor, Lenore Ann Emig, Dorai Ramprasad, Gamini Ananda Vedage, Frederick C. Wilhelm
Patented Case
View Patent ↗
Granted: Feb 6, 2001
Filed: Apr 28, 2000
Inventors
Hao Ding
John N. Armor
Lenore Ann Emig
Dorai Ramprasad
Gamini Ananda Vedage
Frederick C. Wilhelm
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.