IP Library › Granted Patent US 4,995,983
Granted Patent Utility
US 4,995,983 · App. 07/496,576

Membrane separation process

Inventors: Donald T. Eadie, Thomas M. Fyles
Patented Case View Patent ↗
Granted: Feb 26, 1991 Filed: Mar 21, 1990
Inventors
Donald T. Eadie
Thomas M. Fyles
Assignee (at issue)
MacMillan Bloedel Limited

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 4,995,983
App. No.
07/496,576
Filed
1990-03-21
Granted
1991-02-26
Kind
A