Granted Patent
Utility
US 4,590,308 · App. 06/694,161
Selective halogenation of benzene di and tri-methanol compounds
Inventors:
Alan T. Costello, David J. Milner
Patented Case
View Patent ↗
Granted: May 20, 1986
Filed: Jan 23, 1985
Inventors
Alan T. Costello
David J. Milner
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED
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.