Granted Patent
Utility
US 4,550,167 · App. 06/497,027
Preparation of 1-alkyl-1,4-dihydro-4-oxo-7-(4-pyridyl)-3-quinoline carboxylic acid
Inventor:
Venkataraman Ramachandran
Patented Case
View Patent ↗
Granted: Oct 29, 1985
Filed: May 23, 1983
Inventor
Venkataraman Ramachandran
Assignee (at issue)
Ethyl Corporation
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.