Granted Patent
Utility
US 4,961,909 · App. 07/433,868
Process for the manufacture of copper arsenate
Inventor:
Daniel A. D. Boateng
Patented Case
View Patent ↗
Granted: Oct 9, 1990
Filed: Nov 9, 1989
Inventor
Daniel A. D. Boateng
Assignee (at issue)
Comino Ltd.
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.