Granted Patent
Utility
US 4,242,278 · App. 05/948,126
Process for the preparation of 2-(2',2',2'-trihalogenoethyl)-4-halogenocyclobutan-1-ones
Inventors:
Pierre Martin, Hans Greuter, Eginhard Steiner, Daniel Bellus
Patented Case
View Patent ↗
Granted: Dec 30, 1980
Filed: Oct 3, 1978
Inventors
Pierre Martin
Hans Greuter
Eginhard Steiner
Daniel Bellus
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.