IP Library › Granted Patent US 4,540,793
Granted Patent Utility
US 4,540,793 · App. 06/532,700

Substituted pyridines

Inventor: Venkataraman Ramachandran
Patented Case View Patent ↗
Granted: Sep 10, 1985 Filed: Sep 16, 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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 4,540,793
App. No.
06/532,700
Filed
1983-09-16
Granted
1985-09-10
Kind
A