Granted Patent
Utility
US 5,094,701 · App. 07/677,915
Cleaning agents comprising beta-diketone and beta-ketoimine ligands and a process for using the same
Inventors:
John Anthony Thomas Norman, John C. Ivankovits, David A. Roberts, David A. Bohling
Patented Case
View Patent ↗
Granted: Mar 10, 1992
Filed: Apr 1, 1991
Inventors
John Anthony Thomas Norman
John C. Ivankovits
David A. Roberts
David A. Bohling
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.