IP Library › Granted Patent US 4,699,993
Granted Patent Utility
US 4,699,993 · App. 06/808,000

Perfluoroalkylnaphthalene compounds

Inventor: Vernon O. Brandt
Patented Case View Patent ↗
Granted: Oct 13, 1987 Filed: Dec 12, 1985
Inventor
Vernon O. Brandt
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 4,699,993
App. No.
06/808,000
Filed
1985-12-12
Granted
1987-10-13
Kind
A