Granted Patent
Utility
US 5,082,535 · App. 07/622,282
Apparatus for the extraction of oil or polychlorinated biphenyl from electrical parts through the use of solvents and for distillation of the solvents
Inventors:
Gustav Oesch, Paul Gmeiner, Urs Hofer
Patented Case
View Patent ↗
Granted: Jan 21, 1992
Filed: Dec 6, 1990
Inventors
Gustav Oesch
Paul Gmeiner
Urs Hofer
Assignee (at issue)
Micafil AG
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.