Granted Patent
Utility
US 4,300,901 · App. 06/153,641
Liquid form of dyestuffs
Inventors:
Brian L. Yates, Malcolm C. Clark
Patented Case
View Patent ↗
Granted: Nov 17, 1981
Filed: May 27, 1980
Inventors
Brian L. Yates
Malcolm C. Clark
Assignee (at issue)
Ciba-Geigy
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.