Granted Patent
Utility
US 4,736,040 · App. 06/815,918
Preparation of 1,2-benzisothiazolones
Inventors:
Peter Tonne, Hagen Jaedicke
Patented Case
View Patent ↗
Granted: Apr 5, 1988
Filed: Jan 2, 1986
Inventors
Peter Tonne
Hagen Jaedicke
Assignee (at issue)
BASF SE
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.