Granted Patent
Utility
US 4,331,805 · App. 06/156,947
V-Triazolyl-[4,5-d]-pyrimidines
Inventor:
Ian J. Fletcher
Patented Case
View Patent ↗
Granted: May 25, 1982
Filed: May 30, 1980
Inventor
Ian J. Fletcher
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.