Granted Patent
Utility
US 4,515,957 · App. 06/410,170
Purification of mercaptobenzothiazole
Inventor:
Chong-Kuang Shaw
Patented Case
View Patent ↗
Granted: May 7, 1985
Filed: Aug 20, 1982
Inventor
Chong-Kuang Shaw
Assignee (at issue)
B. F. Goodrich 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.