Granted Patent
Utility
US 4,462,925 · App. 06/325,104
Stable solutions of optical brighteners
Inventor:
Peter Stuart Littlewood
Patented Case
View Patent ↗
Granted: Jul 31, 1984
Filed: Nov 27, 1981
Inventor
Peter Stuart Littlewood
Assignee (at issue)
Sandoz AG
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.