Granted Patent
Utility
US 4,785,131 · App. 07/112,399
Substituted cyanonaphthalene process
Inventor:
Venkataraman Ramachandran
Patented Case
View Patent ↗
Granted: Nov 15, 1988
Filed: Oct 26, 1987
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.