Granted Patent
Utility
US 5,287,632 · App. 07/557,283
Supercritical fluid and near critical gas extraction of organic solvents from formed articles
Inventors:
Lawrence B. Heit, James M. Clevenger
Patented Case
View Patent ↗
Granted: Feb 22, 1994
Filed: Jul 24, 1990
Inventors
Lawrence B. Heit
James M. Clevenger
Assignee (at issue)
Ciba-Geigy
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.