Granted Patent
Utility
US 4,159,291 · App. 05/888,221
Outlet means for vapor-liquid contacting tray
Inventors:
Walter Bruckert, David W. Weiler
Patented Case
View Patent ↗
Granted: Jun 26, 1979
Filed: Mar 20, 1978
Inventors
Walter Bruckert
David W. Weiler
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.