Granted Patent
Utility
US 4,894,091 · App. 07/086,337
Phenolic benzothiazole derivatives and their use as corrosion inhibitors
Inventors:
Adalbert Braig, Hans-Rudolf Meier, David G. Leppard, Robert C. Wasson, Emyr Phillips
Patented Case
View Patent ↗
Granted: Jan 16, 1990
Filed: Aug 17, 1987
Inventors
Adalbert Braig
Hans-Rudolf Meier
David G. Leppard
Robert C. Wasson
Emyr Phillips
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.