Granted Patent
Utility
US 4,904,821 · App. 07/206,488
Method of preparing peracetic acid
Inventors:
Georg Boehme, Willi Hofen, Guenther Prescher, Rainer Siegmeier
Patented Case
View Patent ↗
Granted: Feb 27, 1990
Filed: Jun 14, 1988
Inventors
Georg Boehme
Willi Hofen
Guenther Prescher
Rainer Siegmeier
Assignee (at issue)
Degussa AG
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.