Granted Patent
Utility
US 5,281,479 · App. 07/837,245
Corrosion and heat-resistant ordered packing for mass transfer and heat exchange processes
Inventors:
Siegbert Rittner, Jurgen Spiske, Dieter Kompalik, Udo Gruber
Patented Case
View Patent ↗
Granted: Jan 25, 1994
Filed: Feb 14, 1992
Inventors
Siegbert Rittner
Jurgen Spiske
Dieter Kompalik
Udo Gruber
Assignee (at issue)
Sigri Great Lakes Carbon GmbH
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.