Granted Patent
Utility
US 4,506,986 · App. 06/534,955
Method and apparatus for preparating liquid mixtures
Inventor:
Barrie A. Freeman
Patented Case
View Patent ↗
Granted: Mar 26, 1985
Filed: Sep 22, 1983
Inventor
Barrie A. Freeman
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.