Granted Patent
Utility
US 4,247,482 · App. 06/103,210
Process for producing bis(N,N-dialkylamino)alkyl ethers employing sulfur trioxide vapor
Inventor:
Fedor Poppelsdorf
Patented Case
View Patent ↗
Granted: Jan 27, 1981
Filed: Dec 13, 1979
Inventor
Fedor Poppelsdorf
Assignee (at issue)
Union Carbide 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.