Granted Patent
Utility
US 5,185,474 · App. 07/875,553
Synthesis of fluorinated dimethyl ethers
Inventor:
Gerald J. O'Neill
Patented Case
View Patent ↗
Granted: Feb 9, 1993
Filed: Apr 27, 1992
Inventor
Gerald J. O'Neill
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.