Granted Patent
Utility
US 4,314,974 · App. 06/034,805
Solvent extraction method using static mixers
Inventors:
Donald R. Libby, Sung-Jen Chen
Patented Case
View Patent ↗
Granted: Feb 9, 1982
Filed: Apr 30, 1979
Inventors
Donald R. Libby
Sung-Jen Chen
Assignee (at issue)
Chemineer, Inc.
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.