IP Library › Granted Patent US 5,300,396
Granted Patent Utility
US 5,300,396 · App. 07/619,154

Process of making naphthoquinone diazide esters using lactone solvents

Inventors: Dinesh N. Khanna, Robert E. Potvin
Patented Case View Patent ↗
Granted: Apr 5, 1994 Filed: Nov 28, 1990
Inventors
Dinesh N. Khanna
Robert E. Potvin
Assignee (at issue)
Hoechst Celanese 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 5,300,396
App. No.
07/619,154
Filed
1990-11-28
Granted
1994-04-05
Kind
A