Granted Patent
Utility
US 4,994,622 · App. 07/133,733
Amines from alcohols
Inventors:
Pak Y. Fong, Kim R. Smith, Joe D. Sauer
Patented Case
View Patent ↗
Granted: Feb 19, 1991
Filed: Dec 16, 1987
Inventors
Pak Y. Fong
Kim R. Smith
Joe D. Sauer
Assignee (at issue)
Ethyl 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.