Granted Patent
Utility
US 6,165,973 · App. 09/493,341
Fluorescent whitening agent, its preparation and use
Inventor:
Richard L. Baker
Patented Case
View Patent ↗
Granted: Dec 26, 2000
Filed: Jan 28, 2000
Inventor
Richard L. Baker
Assignee (at issue)
Ciba Specialty Chemicals Corporation
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.