IP Library › Granted Patent US 4,647,704
Granted Patent Utility
US 4,647,704 · App. 06/856,313

Hydrocracking process for liquefaction of lignin

Inventors: Dusan J. Engel, Karl Z. Steigleder
Patented Case View Patent ↗
Granted: Mar 3, 1987 Filed: Apr 28, 1986
Inventors
Dusan J. Engel
Karl Z. Steigleder
Assignee (at issue)
UOP LLC

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 4,647,704
App. No.
06/856,313
Filed
1986-04-28
Granted
1987-03-03
Kind
A