Granted Patent
Utility
US 4,170,521 · App. 05/907,943
Purification of triazoles
Inventor:
Richard P. Carr
Patented Case
View Patent ↗
Granted: Oct 9, 1979
Filed: May 22, 1978
Inventor
Richard P. Carr
Assignee (at issue)
The Sherwin-Williams Company
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.