Granted Patent
Utility
US 4,306,077 · App. 06/086,033
Process for separating cis and trans isomers of cyclopropane carboxylic acids
Inventor:
Thomas Leigh
Patented Case
View Patent ↗
Granted: Dec 15, 1981
Filed: Oct 18, 1979
Inventor
Thomas Leigh
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED
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.