Granted Patent
Utility
US 6,476,274 · App. 09/936,121
Method of producing cyclobutanone
Inventors:
Hans-Joachim Knops, Bernd Gallenkamp, Lubbertus Mulder, Stefan Antons
Patented Case
View Patent ↗
Granted: Nov 5, 2002
Filed: Sep 6, 2001
Inventors
Hans-Joachim Knops
Bernd Gallenkamp
Lubbertus Mulder
Stefan Antons
Assignee (at issue)
Bayer Aktiengesellschaft
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.