Granted Patent
Utility
US 4,595,536 · App. 06/732,989
Triphenylmethane dyestuff
Inventors:
William M. Hung, Jack M. Knox
Patented Case
View Patent ↗
Granted: Jun 17, 1986
Filed: May 13, 1985
Inventors
William M. Hung
Jack M. Knox
Assignee (at issue)
Hilton Davis Chemical Co.
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.