Granted Patent
Utility
US 4,555,575 · App. 06/698,690
Process for preparing 2,3-dichloro-5-trichloromethylpyridine
Inventor:
David Cartwright
Patented Case
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Granted: Nov 26, 1985
Filed: Feb 6, 1985
Inventor
David Cartwright
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.