Granted Patent
Utility
US 5,202,240 · App. 07/864,141
Preparation of spore free, concentrated protein preparations from Bacillus thuringiensis serovar,israelensis, which is toxic
Inventors:
Hans Zaehner, Konrad Bernhard, Harald Weisser
Patented Case
View Patent ↗
Granted: Apr 13, 1993
Filed: Apr 6, 1992
Inventors
Hans Zaehner
Konrad Bernhard
Harald Weisser
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.