Granted Patent
Utility
US 4,703,113 · App. 06/764,999
Water-soluble triazine black dyes free from cellulose reactive groups and suitable for use in inks
Inventors:
Anthony G. W. Baxter, Stephen B. Bostock, David Greenwood
Patented Case
View Patent ↗
Granted: Oct 27, 1987
Filed: Aug 12, 1985
Inventors
Anthony G. W. Baxter
Stephen B. Bostock
David Greenwood
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.