IP Library › Granted Patent US 4,961,321
Granted Patent Utility
US 4,961,321 · App. 07/316,627

Bis (difluoromethyl) ether refrigerant

Inventors: Gerald J. O'Neill, Robert S. Holdsworth
Patented Case View Patent ↗
Granted: Oct 9, 1990 Filed: Feb 28, 1989
Inventors
Gerald J. O'Neill
Robert S. Holdsworth
Assignee (at issue)
W.R. Grace & Co. Conn.

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 4,961,321
App. No.
07/316,627
Filed
1989-02-28
Granted
1990-10-09
Kind
A